Questions on Algebra: Linear Equations, Graphs, Slope answered by real tutors!

Tutors Answer Your Questions about Linear-equations (FREE)

Question 18960: I need to write this equation x+(1/y)=7 in standard form ax+by=c where all fractions are cleared and "a" is not negative. I tried multiplying each term by "y" but I ended up with xy +1=7y then xy-7y=-1 which does not make much sense. Thanks for your help!
Click here to see answer by mmm4444bot(95)

Question 18953: How do i solve this equation?
1/2 x -8 =14+ 1/2 x
Click here to see answer by mmm4444bot(95)

Question 18953: How do i solve this equation?
1/2 x -8 =14+ 1/2 x
Click here to see answer by Alwayscheerful(414)

Question 18968: n-4(1+5n)=-2
Click here to see answer by mmm4444bot(95)

Question 18932: How do i solve this equation?
4+6x-9x=3x
Click here to see answer by piglet162431(90)

Question 18975: 24a-8-10a=-2(4-7a)
Click here to see answer by Alwayscheerful(414)

Question 18967: help me graph this equation, please
y= -x + 4
sorry
Click here to see answer by Alwayscheerful(414)

Question 18929: How do i solve this equation?
3g+9=15g-9
Click here to see answer by Alwayscheerful(414)

Question 18930: How do i solve this equation?
3(4c+7)=12c
Click here to see answer by Alwayscheerful(414)

Question 18984: Is the following a linear transformation from R3 to R3:
L(x1,x2,x3) = (x3, x1+2x2-5x3, x1-x2) ?
ok so i've worked on this a while, and i'm wondering: is it correct to show that the formulas

is closed under scalar multiplication and addition? and if it is, does that mean that the answer is yes? thank you so much for your help!
Click here to see answer by khwang(438)

Question 19120: Find an equation for the line with the given properties:
Passing thru the point (-4,-1), parallel to the line x - 4y = 2
I wrote x - 4y = 2 in slope intercept form, as y = -1/2x + 1/4
is this correct?
Click here to see answer by mmm4444bot(95)

Question 19241: how can i graph x-3y=6 on a graph
Click here to see answer by venugopalramana(3286)

Question 17934: 0.4r-1.2=0.3r+0.6
Click here to see answer by kikerkins(17)

Question 19270: Hi, can you please help me with this one?
The question is:
Solve the system of linear equations by the addition method. Then state whether the system is independent, inconsistent or dependent:
1/2x + 1/3y = 1/3
1/6x + 1/3y = 2/9
Thanks!
Click here to see answer by venugopalramana(3286)

Question 19292: Hi, I need help with this one. It's driving me crazy!
A textbook company uses the equations R = 30x and C = 5x + 3000 to represent the revenue and cost of textbook sales respectively. The number of textbooks is represented by x.
a) For what number of textbooks is the cost equal to the revenue?
b) Using the Profit Formula (Profit = Revenue - Cost), write an algabraic expression the represents the Profit for x textbooks.
Thanks for your help!
Click here to see answer by Earlsdon(6294)

Question 19338: Hi,
I need help with finding the LCM
x^2+x-6;x^2+8+15;x^2-25
Thanks
Click here to see answer by venugopalramana(3286)

Question 19527: please show me how to solve 3x=x/2-10
Click here to see answer by Earlsdon(6294)

Question 19527: please show me how to solve 3x=x/2-10
Click here to see answer by MelanieBCC(40)

Question 19577: show that B={4TSQUARE-8T+4,2T+1,T-3} IS A BASIS FOR PSUB2(t)
Click here to see answer by venugopalramana(3286)

Question 19622: Can you please help me solve this equation. I have tried numerous time, getting frustrated.
Write the equation of the line which passes through the point (2,1) and is parallel to the line with equation y=5/2x+6
Click here to see answer by longjonsilver(2297)

Question 19623: I am having problems solving this equation.
write the equation of the line passing through (2,-1) and (3,-1)
Click here to see answer by longjonsilver(2297)

Question 19621: Can you please help me solve
A line passing through (6,9)and (5,y)is parallel to a line with slope 5. What is the value of y?
Click here to see answer by venugopalramana(3286)

Question 19632: Please help me solve this:
2b+a=11
a-b=5

Click here to see answer by xcentaur(357)

Question 19715: Solve the equasions x+4=-1: 5b=-25: 3x+4=13: 5(x-2)=15: x+8=3(x-4)
Click here to see answer by rahman(247)

Question 19731: I am trying to find the Y so that the line passing through the two points has the given slope. I am not exactly clear on how to find the Y in this problem.
(2,y), (3,3), m=2
This is what I've tried so far
3-y/3-2=2y/1 This is as far as I got. Please help. Thanks
Click here to see answer by xcentaur(357)

Question 19792: What is prime factorization? How do I find the prime factorization of 90?
Click here to see answer by xcentaur(357)

Question 19790: Please help me solve this one:
If the 3-digit number 27d, in which d is the ones' digit, is evenly divisible by both 3 and 4, what is the velue of d?
Click here to see answer by wuwei96815(245)

Question 19910: 1. 5x-7x-14x=

2. 6m-2(3m+4)=
3. 7(h-1)+3(4-3h)=
4. -5x+7(x-4(1-x))=
5. 3/5D=3/4
6. 2x-6x+3=19
7. -2d-10=4+5d
8. 8b-3(3b-1)=3b+5
9.ten less than the product of eight and a number
10. 4/x = 13/3x-7
Click here to see answer by christinaaa192(28)

Question 19820: Mary is 5 years older than her brother Bob and the sum of their ages is 81. How old is each? and can you show me how you worked it out that's wher I get confused the most
Click here to see answer by sukusu(21)

Question 20184: how do i do S=2(3.14)rh solve for h
Click here to see answer by mmm4444bot(95)

Question 20230: What is P?
50 - P =.5P - 10
Click here to see answer by Alwayscheerful(414)

Question 20292: I am a parent trying to hel a struggling 12 year old with pre-algebra. My own Algebra is shaky at best. please let me know if this is the correct answer.
-3 - -13 - 10 - 3 = -3
Click here to see answer by elima(1433)

Question 20341: 8x-3x=10

Click here to see answer by jennaprior(1)

Question 20700: Help me solve -3/5=-7/10x
Click here to see answer by akmb1215(68)

Question 20870: I'm stumped. Solve for Y
4(2y-5)=2(4y-10)
8y-20=8y-20
8y-20+20=8y-20+20
8y=8y
1/8*8y=1/8*8y
y=y
Were am I going wrong?
Click here to see answer by venugopalramana(3286)

Question 20857: Please help solve this problem and explain how you came up with the answer.
3x +y =11
x + y = 5
Click here to see answer by kapilsinghi(68)

Question 20924: 12-4m< 4

Click here to see answer by SuperGirl98734(12)

Question 21030: Hi I am a parent trying to help my son in Algebra homework...
We understand some of it but not from the second line down. Your help is really needed..
7(6-y)=-3(y-2)
42-7y = -3y-6 {what number do we add or subtract to each side & why}
42-7y+3y = -3y-6+3y
42+y = -6
42+y-42 = -6-42
y=48
Is THAT CORRECT?

Click here to see answer by Here2Help(19)

Question 21044: Help!
Equation:
-3(4x+1)+6x=4(2x-6)
I came up with x=-2.1
Is that right?
Click here to see answer by Alwayscheerful(414)

Question 21231: WHAT DOES IT MEAN BY SUBTITUTION WITH THIS PROBLEM
3X-5Y=-12
X+ 2Y=7
Click here to see answer by elima(1433)

Question 21323: I have this major problem I need help my teacher is flying please help me with ths problem!!
is (2, 1/4) a solution of y= - 1/4x + 3/4?

Click here to see answer by elima(1433)

Question 21344: please help me solve this equation with my daughter. we have tried to solve -but cannot. -3x+2(4x-1)+6+6(-7x-15)+2(4x+6)-3(x+5)=4x+6x-3+4(-8x-5)-(-4x-5)-(-4x+6)+(2x-18)+6-3x+9x+8(4x+16)5x+1 That is called a killer equations that is what my teacher says.
Click here to see answer by venugopalramana(3286)

Question 21355: ok i have many more problems to go like this and i need help FAST i need to go to bed and i have algebra 1st hr so please explain in DETAIL! how i would work this out you do not have to give me the answer this is how it starts in my textbook.(-17,-8)(-7,-4) but i do know it starts like this..
m = -8 - -4
_______ = -4/-10? and then im lost but what i have is kind of experimental

-17 - -7

m = -8 - -4
_______ = -4/-10 = -2/-5?

-17 - -7
(y - -8) = -2/-5 (x - -17)
y - -8 = 10x - -170
+8 +8
y = 10x + -178
-10 -10
-(-10x + y = 82)
answer? 10x + -y = -82???
the steps are missing i know but i was trying by looking off what i did in class with the teachers help but it didnt work very well so please can anyone help me!?!?
Click here to see answer by venugopalramana(3286)

Question 21352: ok i have many more problems to go like this and i need help FAST i need to go to bed and i have algebra 1st hr so please explain in DETAIL! how i would work this out you do not have to give me the answer this is how it starts in my textbook.(-17,-8)(-7,-4) but i do know it starts like this..
m = -8 - -4
_______ = -4/-10? and then im lost but what i have is kind of experimental

-17 - -7

m = -8 - -4
_______ = -4/-10 = -2/-5?

-17 - -7
(y - -8) = -2/-5 (x - -17)
y - -8 = 10x - -170
+8 +8
y = 10x + -178
-10 -10
-(-10x + y = 82)
answer? 10x + -y = -82???
the steps are missing i know but i was trying by looking off what i did in class with the teachers help but it didnt work very well so please can anyone help me!?!?
Click here to see answer by venugopalramana(3286)

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590, 4591..4635, 4636..4680, 4681..4725, 4726..4770, 4771..4815, 4816..4860, 4861..4905, 4906..4950, 4951..4995, 4996..5040, 5041..5085, 5086..5130, 5131..5175, 5176..5220, 5221..5265, 5266..5310, 5311..5355, 5356..5400, 5401..5445, 5446..5490, 5491..5535, 5536..5580, 5581..5625, 5626..5670, 5671..5715, 5716..5760, 5761..5805, 5806..5850, 5851..5895, 5896..5940, 5941..5985, 5986..6030, 6031..6075, 6076..6120, 6121..6165, 6166..6210, 6211..6255, 6256..6300, 6301..6345, 6346..6390, 6391..6435, 6436..6480, 6481..6525, 6526..6570, 6571..6615, 6616..6660, 6661..6705, 6706..6750, 6751..6795, 6796..6840, 6841..6885, 6886..6930, 6931..6975, 6976..7020, 7021..7065, 7066..7110, 7111..7155, 7156..7200, 7201..7245, 7246..7290, 7291..7335, 7336..7380, 7381..7425, 7426..7470, 7471..7515, 7516..7560, 7561..7605, 7606..7650, 7651..7695, 7696..7740, 7741..7785, 7786..7830, 7831..7875, 7876..7920, 7921..7965, 7966..8010, 8011..8055, 8056..8100, 8101..8145, 8146..8190, 8191..8235, 8236..8280, 8281..8325, 8326..8370, 8371..8415, 8416..8460, 8461..8505, 8506..8550, 8551..8595, 8596..8640, 8641..8685, 8686..8730, 8731..8775, 8776..8820, 8821..8865, 8866..8910, 8911..8955, 8956..9000, 9001..9045, 9046..9090, 9091..9135, 9136..9180, 9181..9225, 9226..9270, 9271..9315, 9316..9360, 9361..9405, 9406..9450, 9451..9495, 9496..9540, 9541..9585, 9586..9630, 9631..9675, 9676..9720, 9721..9765, 9766..9810, 9811..9855, 9856..9900, 9901..9945, 9946..9990, 9991..10035, 10036..10080, 10081..10125, 10126..10170, 10171..10215, 10216..10260, 10261..10305, 10306..10350, 10351..10395, 10396..10440, 10441..10485, 10486..10530, 10531..10575, 10576..10620, 10621..10665, 10666..10710, 10711..10755, 10756..10800, 10801..10845, 10846..10890, 10891..10935, 10936..10980, 10981..11025, 11026..11070, 11071..11115, 11116..11160, 11161..11205, 11206..11250, 11251..11295, 11296..11340, 11341..11385, 11386..11430, 11431..11475, 11476..11520, 11521..11565, 11566..11610, 11611..11655, 11656..11700, 11701..11745, 11746..11790, 11791..11835, 11836..11880, 11881..11925, 11926..11970, 11971..12015, 12016..12060, 12061..12105, 12106..12150, 12151..12195, 12196..12240, 12241..12285, 12286..12330, 12331..12375, 12376..12420, 12421..12465, 12466..12510, 12511..12555, 12556..12600, 12601..12645, 12646..12690, 12691..12735, 12736..12780, 12781..12825, 12826..12870, 12871..12915, 12916..12960, 12961..13005, 13006..13050, 13051..13095, 13096..13140, 13141..13185, 13186..13230, 13231..13275, 13276..13320, 13321..13365, 13366..13410, 13411..13455, 13456..13500, 13501..13545, 13546..13590, 13591..13635, 13636..13680, 13681..13725, 13726..13770, 13771..13815, 13816..13860, 13861..13905, 13906..13950, 13951..13995, 13996..14040, 14041..14085, 14086..14130, 14131..14175, 14176..14220, 14221..14265, 14266..14310, 14311..14355, 14356..14400, 14401..14445, 14446..14490, 14491..14535, 14536..14580, 14581..14625, 14626..14670, 14671..14715, 14716..14760, 14761..14805, 14806..14850, 14851..14895, 14896..14940, 14941..14985, 14986..15030, 15031..15075, 15076..15120, 15121..15165, 15166..15210, 15211..15255, 15256..15300, 15301..15345, 15346..15390, 15391..15435, 15436..15480, 15481..15525, 15526..15570, 15571..15615, 15616..15660, 15661..15705, 15706..15750, 15751..15795, 15796..15840, 15841..15885, 15886..15930, 15931..15975, 15976..16020, 16021..16065, 16066..16110, 16111..16155, 16156..16200, 16201..16245, 16246..16290, 16291..16335, 16336..16380, 16381..16425, 16426..16470, 16471..16515, 16516..16560, 16561..16605, 16606..16650, 16651..16695, 16696..16740, 16741..16785, 16786..16830, 16831..16875, 16876..16920, 16921..16965, 16966..17010, 17011..17055, 17056..17100, 17101..17145, 17146..17190, 17191..17235, 17236..17280, 17281..17325, 17326..17370, 17371..17415, 17416..17460, 17461..17505, 17506..17550, 17551..17595, 17596..17640, 17641..17685, 17686..17730, 17731..17775, 17776..17820, 17821..17865, 17866..17910, 17911..17955, 17956..18000, 18001..18045, 18046..18090, 18091..18135, 18136..18180, 18181..18225, 18226..18270, 18271..18315, 18316..18360, 18361..18405, 18406..18450, 18451..18495, 18496..18540, 18541..18585, 18586..18630, 18631..18675, 18676..18720, 18721..18765, 18766..18810, 18811..18855, 18856..18900, 18901..18945, 18946..18990, 18991..19035, 19036..19080, 19081..19125, 19126..19170, 19171..19215, 19216..19260, 19261..19305, 19306..19350, 19351..19395, 19396..19440, 19441..19485, 19486..19530, 19531..19575, 19576..19620, 19621..19665, 19666..19710, 19711..19755, 19756..19800, 19801..19845, 19846..19890, 19891..19935, 19936..19980, 19981..20025, 20026..20070, 20071..20115, 20116..20160, 20161..20205, 20206..20250, 20251..20295, 20296..20340, 20341..20385, 20386..20430, 20431..20475, 20476..20520, 20521..20565, 20566..20610, 20611..20655, 20656..20700, 20701..20745, 20746..20790, 20791..20835, 20836..20880, 20881..20925, 20926..20970, 20971..21015, 21016..21060, 21061..21105, 21106..21150, 21151..21195, 21196..21240, 21241..21285, 21286..21330, 21331..21375, 21376..21420, 21421..21465, 21466..21510, 21511..21555, 21556..21600, 21601..21645, 21646..21690, 21691..21735, 21736..21780, 21781..21825, 21826..21870, 21871..21915, 21916..21960, 21961..22005, 22006..22050, 22051..22095, 22096..22140, 22141..22185, 22186..22230, 22231..22275, 22276..22320, 22321..22365, 22366..22410, 22411..22455, 22456..22500, 22501..22545, 22546..22590, 22591..22635, 22636..22680, 22681..22725, 22726..22770, 22771..22815, 22816..22860, 22861..22905, 22906..22950, 22951..22995, 22996..23040, 23041..23085, 23086..23130, 23131..23175, 23176..23220, 23221..23265, 23266..23310, 23311..23355, 23356..23400, 23401..23445, 23446..23490, 23491..23535, 23536..23580, 23581..23625, 23626..23670, 23671..23715, 23716..23760, 23761..23805, 23806..23850, 23851..23895, 23896..23940, 23941..23985, 23986..24030, 24031..24075, 24076..24120, 24121..24165, 24166..24210, 24211..24255, 24256..24300, 24301..24345, 24346..24390, 24391..24435, 24436..24480, 24481..24525, 24526..24570, 24571..24615, 24616..24660, 24661..24705, 24706..24750, 24751..24795, 24796..24840, 24841..24885, 24886..24930, 24931..24975, 24976..25020, 25021..25065, 25066..25110, 25111..25155, 25156..25200, 25201..25245, 25246..25290, 25291..25335, 25336..25380, 25381..25425, 25426..25470, 25471..25515, 25516..25560, 25561..25605, 25606..25650, 25651..25695, 25696..25740, 25741..25785, 25786..25830, 25831..25875, 25876..25920, 25921..25965, 25966..26010, 26011..26055, 26056..26100, 26101..26145, 26146..26190, 26191..26235, 26236..26280, 26281..26325, 26326..26370, 26371..26415, 26416..26460, 26461..26505, 26506..26550, 26551..26595, 26596..26640, 26641..26685, 26686..26730, 26731..26775, 26776..26820, 26821..26865, 26866..26910, 26911..26955, 26956..27000, 27001..27045, 27046..27090, 27091..27135, 27136..27180, 27181..27225, 27226..27270, 27271..27315, 27316..27360, 27361..27405, 27406..27450, 27451..27495, 27496..27540, 27541..27585, 27586..27630, 27631..27675, 27676..27720, 27721..27765, 27766..27810, 27811..27855, 27856..27900, 27901..27945, 27946..27990, 27991..28035, 28036..28080, 28081..28125, 28126..28170, 28171..28215, 28216..28260, 28261..28305, 28306..28350, 28351..28395, 28396..28440, 28441..28485, 28486..28530, 28531..28575, 28576..28620, 28621..28665, 28666..28710, 28711..28755, 28756..28800, 28801..28845, 28846..28890, 28891..28935, 28936..28980, 28981..29025, 29026..29070, 29071..29115, 29116..29160, 29161..29205, 29206..29250, 29251..29295, 29296..29340, 29341..29385, 29386..29430, 29431..29475, 29476..29520, 29521..29565, 29566..29610, 29611..29655, 29656..29700, 29701..29745, 29746..29790, 29791..29835, 29836..29880, 29881..29925, 29926..29970, 29971..30015, 30016..30060, 30061..30105, 30106..30150, 30151..30195, 30196..30240, 30241..30285, 30286..30330, 30331..30375, 30376..30420, 30421..30465, 30466..30510, 30511..30555, 30556..30600, 30601..30645, 30646..30690, 30691..30735, 30736..30780, 30781..30825, 30826..30870, 30871..30915, 30916..30960, 30961..31005, 31006..31050, 31051..31095, 31096..31140, 31141..31185, 31186..31230, 31231..31275, 31276..31320, 31321..31365, 31366..31410, 31411..31455, 31456..31500, 31501..31545, 31546..31590, 31591..31635, 31636..31680, 31681..31725, 31726..31770, 31771..31815, 31816..31860, 31861..31905, 31906..31950, 31951..31995, 31996..32040, 32041..32085, 32086..32130, 32131..32175, 32176..32220, 32221..32265, 32266..32310, 32311..32355, 32356..32400, 32401..32445, 32446..32490, 32491..32535, 32536..32580, 32581..32625, 32626..32670, 32671..32715, 32716..32760, 32761..32805, 32806..32850, 32851..32895, 32896..32940, 32941..32985, 32986..33030, 33031..33075, 33076..33120, 33121..33165, 33166..33210, 33211..33255, 33256..33300, 33301..33345, 33346..33390, 33391..33435, 33436..33480, 33481..33525, 33526..33570, 33571..33615, 33616..33660, 33661..33705, 33706..33750, 33751..33795, 33796..33840, 33841..33885, 33886..33930, 33931..33975, 33976..34020, 34021..34065, 34066..34110, 34111..34155, 34156..34200, 34201..34245, 34246..34290, 34291..34335, 34336..34380, 34381..34425, 34426..34470, 34471..34515, 34516..34560, 34561..34605, 34606..34650, 34651..34695, 34696..34740, 34741..34785, 34786..34830, 34831..34875, 34876..34920, 34921..34965, 34966..35010, 35011..35055, 35056..35100, 35101..35145, 35146..35190, 35191..35235, 35236..35280, 35281..35325, 35326..35370, 35371..35415, 35416..35460, 35461..35505, 35506..35550, 35551..35595, 35596..35640, 35641..35685, 35686..35730, 35731..35775, 35776..35820, 35821..35865, 35866..35910, 35911..35955, 35956..36000, 36001..36045