Questions on Algebra: Equations answered by real tutors!

Tutors Answer Your Questions about Equations (FREE)

Question 538427: Please help me solve: -3x+9+5x=-13

Click here to see answer by jim_thompson5910(35256)

Question 538206: factor x^4-11x^3-12x^2

Click here to see answer by jim_thompson5910(35256)

Question 537875: How to solve 8-2c=2c
Click here to see answer by jim_thompson5910(35256)

Question 537739: What is eqivalent to 5k?
a. 9k-4k
b. (2k)(3k)
c. 6k2-k
Click here to see answer by jim_thompson5910(35256)

Question 537737: What is the factor of 16x^2- 25y^2=
Click here to see answer by jim_thompson5910(35256)

Question 538541: June earns $3 an hour for the first 40 hours, then $4.50 an hour for overtime. How many hours must she work in order to make at least $165?
Click here to see answer by Mathpassionate(25)

Question 538683: 3Y+1=13
Click here to see answer by jim_thompson5910(35256)

Question 538890: WHat is the smallest 4-digit even number less than 8000?
Click here to see answer by AnlytcPhil(1806)

Question 538903: Please help me factor
I know that the first number in the bracket will probably have to be 9 or 3 but I'm not sure about how about the other numbers since 89 and 40 do not have a common multiple.
Thanks!
Click here to see answer by jim_thompson5910(35256)

Question 538933: How do I work this sentence into an equation: Twice a number is 12 more than five times the number.
Click here to see answer by jim_thompson5910(35256)

Question 538936: 9-y=5
over
44=22
Click here to see answer by jim_thompson5910(35256)

Question 539186: Do the equations x = 4y +1 and x = 4y -1 have the same solution?
Click here to see answer by jim_thompson5910(35256)

Question 538792: -9 -b +8b=-23
Click here to see answer by jim_thompson5910(35256)

Question 539735: how do I divide and write answer in standard form for (-2-3i)/i
Click here to see answer by ptaylor(2198)

Question 539813: 64x + 5 = 133
64 * x + 5=133
64 * x +5 -133=0
64 * x + -128
64/64 64/128
x=2
I am not understanding why the 133 became a negative number nor do I understand why the answer is a positive answer.
I understand how I got the answer but I am not understanding how the positive/negative works:/ Thank you in advance
Click here to see answer by richard1234(7193)

Question 540159: 2(r+5)=22r is thi a null set?

Click here to see answer by stanbon(75887)

Question 540204: what equations can i use to represent the starting hourly wage if y is the income and x is the hours worked?
Click here to see answer by jim_thompson5910(35256)

Question 540208: how do you do this step by step .
-3c+2=7c-8
Click here to see answer by jim_thompson5910(35256)

Question 540199: 9y-4-6y=2(y+1)-5
Y=
Click here to see answer by jim_thompson5910(35256)

Question 540272: 7y+4(y-8)=4(y+2)-2
Click here to see answer by jim_thompson5910(35256)

Question 540468: How do you factor 5d^2 + 25d + 10
Click here to see answer by boilpoil(127)

Question 540457: a+b=6
b+c=5
c+d=4
d+e=2
e+a=2
Solve for all.
Click here to see answer by boilpoil(127)

Question 540467: How do you factor m^2 + 30m - 96
Click here to see answer by jim_thompson5910(35256)

Question 540372: Write each equation in standard form using integers.
y=2/3x+7y
(the 2/3x is a fraction)
Click here to see answer by jim_thompson5910(35256)

Question 540161: 4(t-8) + 20=5
Click here to see answer by jim_thompson5910(35256)

Question 540139: Write y-4=1/3(x+5)in standard form
Click here to see answer by jim_thompson5910(35256)

Question 540137: Solve for b1: A=1/2h(b1+b2)
Click here to see answer by jim_thompson5910(35256)

Question 540492: Express the solution to the following inequality using interval notation.
4x - 5 > 15

Click here to see answer by jim_thompson5910(35256)

Question 539942: how do you solve m/15 = 16
Click here to see answer by jim_thompson5910(35256)

Question 539374: What is a solution to the quadratic equation x^2+6x=-10
Click here to see answer by jim_thompson5910(35256)

Question 539369: -8+6n=-32 what does n stand for
Click here to see answer by jim_thompson5910(35256)

Question 539364: i wanted resolve this problem 5+7y=19
Click here to see answer by jim_thompson5910(35256)

Question 540526: how do I show or check my work for x+3/7=5/8. I know the answer is 11/56, but how do i prove it?
Click here to see answer by josmiceli(19441)

Question 540687: 7x+8=50

Click here to see answer by boilpoil(127)

Question 540743: I have 3 questions that I absolutely cannot figure out for my review for a test. Please if you do not mind showing me how you figure this out I would appreciate it so I know how to do the problem as well.
1/x+3 = 7x+4/x^2+4x+3 - 1/x+1
The way that I did that is it should read 1 over x+3 equals 7x plus 4 over x squared plus 4x plus 3 minus 1 over x+1
Click here to see answer by mananth(16946)

Question 540744: This is yet another one that I cannot figure out on my review for my test. These frustrate me! Please if you can show me how to figure it out as well that would be appreciated!
x+2/6 - x-2/12 = 1/12
That should read X+2 over 6 minus x-2 over 12 equals 1 over 12
Click here to see answer by josmiceli(19441)

Question 540745: This is the last one that I am struggling with.
2r-2/ r^2+3r-28 + 4/r+7 = r/r-4
This should read 2r-2 over r squared plus 3r minus 28 plus 4 over r+7 equals 1 over r-4.
Click here to see answer by ankor@dixie-net.com(22740)

Question 540997: I need some help understanding how to answer this question: The distance d, in miles, a small plane is from its final destination is given by d(t) = 250-100t, where t is the time in hours, remaining for the flight. Find and discuss the meaning of the intercepts of the graph of the function.
Thanks!
Click here to see answer by Theo(13342)

Question 541011: x+3= 4x-3
Click here to see answer by jpg7n16(66)

Question 541011: x+3= 4x-3
Click here to see answer by jim_thompson5910(35256)

Question 541029: 4(4x-1)=12

Click here to see answer by jim_thompson5910(35256)

Question 541138: I don't understand on how to solve this problem, 3/7 - 18x = 3/9.
Click here to see answer by mananth(16946)

Question 541138: I don't understand on how to solve this problem, 3/7 - 18x = 3/9.
Click here to see answer by friesr(113)

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, 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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, 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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, 36046..36090, 36091..36135, 36136..36180, 36181..36225, 36226..36270, 36271..36315, 36316..36360, 36361..36405, 36406..36450, 36451..36495, 36496..36540, 36541..36585, 36586..36630, 36631..36675, 36676..36720, 36721..36765, 36766..36810, 36811..36855, 36856..36900, 36901..36945, 36946..36990, 36991..37035, 37036..37080, 37081..37125, 37126..37170, 37171..37215, 37216..37260, 37261..37305, 37306..37350, 37351..37395, 37396..37440, 37441..37485, 37486..37530, 37531..37575, 37576..37620, 37621..37665, 37666..37710, 37711..37755, 37756..37800, 37801..37845, 37846..37890, 37891..37935, 37936..37980, 37981..38025, 38026..38070, 38071..38115, 38116..38160, 38161..38205, 38206..38250, 38251..38295, 38296..38340, 38341..38385, 38386..38430, 38431..38475, 38476..38520, 38521..38565, 38566..38610, 38611..38655, 38656..38700, 38701..38745, 38746..38790, 38791..38835, 38836..38880, 38881..38925, 38926..38970, 38971..39015, 39016..39060, 39061..39105, 39106..39150, 39151..39195, 39196..39240, 39241..39285, 39286..39330, 39331..39375, 39376..39420, 39421..39465, 39466..39510, 39511..39555, 39556..39600, 39601..39645, 39646..39690, 39691..39735, 39736..39780, 39781..39825, 39826..39870, 39871..39915, 39916..39960, 39961..40005, 40006..40050, 40051..40095, 40096..40140, 40141..40185, 40186..40230, 40231..40275, 40276..40320, 40321..40365, 40366..40410, 40411..40455, 40456..40500, 40501..40545, 40546..40590, 40591..40635, 40636..40680, 40681..40725, 40726..40770, 40771..40815, 40816..40860, 40861..40905, 40906..40950, 40951..40995, 40996..41040, 41041..41085, 41086..41130, 41131..41175, 41176..41220, 41221..41265, 41266..41310, 41311..41355, 41356..41400, 41401..41445, 41446..41490, 41491..41535, 41536..41580