Questions on Algebra: Equations answered by real tutors!

Tutors Answer Your Questions about Equations (FREE)

Question 177095: can someone please help me solve this problem please
2(2x - 7) - 5 = 4(3x -6) + 9

Click here to see answer by jim_thompson5910(35256)

Question 177090: (5x2 + 7y - 6z2), (4y + 3x2), (2y - 2x2) all my problem says to do is add. I cant remember how to do this
Click here to see answer by checkley75(3666)

Question 177108: Could you please confirm that I have configured the following formula for the length of an organ pipe correctly:
Given formula F = v/4(l + c ) where F is frequency, v is velocity of sound, l is pipe length and c is an end correction. Is it correct to say:
l + c = v/4f, that is is the correction is added to the length of the pipe or subtracted?

Click here to see answer by stanbon(75887)

Question 177143: Thank you very much for the answer
Now i have another question
can you explain me the process of how this ended up given (25/28)d + 9 = d
I have the following
d/6+d/12+d/7+5+d/2+4=d I do get where the 9 comes from, but i tried to add that up by using LCD and it did not give 25/28.
Please can you explain me the process...
Thanks as always
Click here to see answer by jim_thompson5910(35256)

Question 177197: A graduate student in chemistry needs 172 liters of a 41% saline solution. How many liters of an 18% saline solution must be mixed with a 61% saline solutionto obtain the required new solution?
Click here to see answer by stanbon(75887)

Question 177241: Good afternoon dear tutor
how do i go from
3W=2L+3
to (2/3)L+1
what happened to the 3 please explain thanks
Click here to see answer by jim_thompson5910(35256)

Question 177238: Solve and check. Begin by rewriting the equation without the fraction.
2x/3-5=7. I have no idea how to change the fraction 2x/3 and then to solve the equation. After solving it how do I put the answer back in to check it?
Click here to see answer by jim_thompson5910(35256)

Question 177255: Good afternoon
I have 1/x + 1/1.25x = 1/5
I guess i'm confused why can i multiply through by 5x in order to get
5+5/1.25=x
Could you please explain the process and also offer some tips when dealing with fraction. Thanks a lot
Click here to see answer by jim_thompson5910(35256)

Question 177282: Please help me with:
0.4x -0.15 = 0.65 -0.3(6-2x)
(I multiplied by 100 to get the answer {-5} but it doesn't check.)
Click here to see answer by jim_thompson5910(35256)

Question 177283: Thank you as always, based on this problem i got another question

How did you get that LCD was 6.25? Was it by multiplying 1, 1.25, and 5?
based on the equation 1/x + 1/1.25x = 1/5
Please explain the process .. Thanks as always.
Click here to see answer by stanbon(75887)

Question 177302: how to write a mathematical statement for the given verbal ststement
four less than the quotient of nine and n
eight more than the cube of a
the sum of a and b times the square of e
Click here to see answer by checkley75(3666)

Question 177318: -22=7L-8
I got l=-12

Click here to see answer by jim_thompson5910(35256)

Question 177343: This is a question in a Finance course I am tutoring, but it has me stumped.
If A=D+E and D/A= 0.70, solve for A/E. What am I missing? Thanks.
Click here to see answer by Fombitz(32388)

Question 177357: the formula S= n(n+1)over 2 can be used to find the sum of the first n natural numbers find the sum of the first 100 natural numbers
Click here to see answer by gonzo(654)

Question 177358: solve -5(m-5)=3(10-2m)+m
Click here to see answer by Mathtut(3670)

Question 177374: How would you solve this problem
4 + 3/u+3 = 3/u+2
find all values of u
Thanks in advance!!
Click here to see answer by Fombitz(32388)

Question 177459:
Click here to see answer by jim_thompson5910(35256)

Question 177501: How do I write an equation in slope-intercept?
Click here to see answer by stanbon(75887)

Question 177593:
I have no idea how to formulate this problem. - Thanks - It's from a book
A long-distance foot race marathon covers a course of about 26.2 mi. At one point one woman was three times as far deom the end of the course as she was from the starting point. How many miles had she run at that time?
Click here to see answer by Mathtut(3670)

Question 177751: SOLVE THE EQUATION AND CHECK THE SOLUTION

X + 8 = 2 ( X - 2) - X
Click here to see answer by Mathtut(3670)

Question 177772: SOLVE THE EQUATION AND CHECK THE SOLUTION
8(x + 2) - 3 (2x + 1 ) = 2 ( x + 5 )
Click here to see answer by Mathtut(3670)

Question 177777: SOLVE THE EQUATION AND CHECK THE SOLUTION
17 + y + 32 + y = 100
----- --------
y y
this is fraction signs
Click here to see answer by Mathtut(3670)

Question 177808: How can I find out the answer to -1/8??? So far I have tried doing one divided by eight. I ended up with 0.12. I really don't think that that is the right answer. I have a feeling I'm missing a step that has to do with the negative. Please help! Thank You.
Click here to see answer by stanbon(75887)

Question 177815: I need help with a problem. The problem is 3qt.=_____ gal.
Click here to see answer by nerdybill(7384)

Question 177815: I need help with a problem. The problem is 3qt.=_____ gal.
Click here to see answer by Mathtut(3670)

Question 177815: I need help with a problem. The problem is 3qt.=_____ gal.
Click here to see answer by solver91311(24713)

Question 177839: solve by substitution or elimination method. classify as consistent, inconsistent, or dependent and independent

4x-7y = 29
2x+5y = -11

thank you!!
Click here to see answer by Mathtut(3670)

Question 177840: I need your help factoring this problem...PLEASE!

Click here to see answer by solver91311(24713)

Question 177877: I know the answer to this problem is K=3, but I do not know how to figure out how to get it on my own. Can you show me the steps to figure this out?
5(K-4)+3K = 4
Thanks! Tony
Click here to see answer by stanbon(75887)

Question 177885: 2x+3y=35
5x+4y=7

please solve please thank you!
Click here to see answer by oyakhilome(1)

Question 177885: 2x+3y=35
5x+4y=7

please solve please thank you!
Click here to see answer by jojo14344(1513)

Question 177885: 2x+3y=35
5x+4y=7

please solve please thank you!
Click here to see answer by madhan_math(34)

Question 177854: You are awesome...I have a few more!!! This also needs to be factored. THANK YOU
(x+3)^10(x-5)^7 + (x+3)^9(x-5)^8 =
Click here to see answer by stanbon(75887)

Question 177954: 7-(3x-1)=5x I worked this out in my head as x=1 but I need to learn how to write down the steps taken to get the answer.
Click here to see answer by Mathtut(3670)

Question 177954: 7-(3x-1)=5x I worked this out in my head as x=1 but I need to learn how to write down the steps taken to get the answer.
Click here to see answer by jim_thompson5910(35256)

Question 177980: 3x8-4x(5-1)=3 Explain how the answer comes out to be 3
Click here to see answer by tutorcecilia(2152)

Question 171114: The difference of two integers is 9. Five times the smaller is 7 more than three times the larger. Find the numbers.
Click here to see answer by HyperBrain(694)

Question 178062: x-7>-6
The greater than symbol should have a line under it. I didn't know how to enter it. Please help if possible.

Thanks
Click here to see answer by Mathtut(3670)

Question 178010: 4x-3=11
x=2
Click here to see answer by Mathtut(3670)

Question 178117: Please help me solve this problem.

4a+9b=8
8a+6c=-1
6b+6c=-1

thanks for your help!!
Click here to see answer by stanbon(75887)

Question 178131: sorry i posted the wrong equation, here are the right ones
2x + y = 7
x + 5y = 12
Click here to see answer by jim_thompson5910(35256)

Question 178131: sorry i posted the wrong equation, here are the right ones
2x + y = 7
x + 5y = 12
Click here to see answer by Mathtut(3670)

Question 178143: I=Prt solve for t (can you explain step for step please)
Click here to see answer by Mathtut(3670)

Question 178143: I=Prt solve for t (can you explain step for step please)
Click here to see answer by jim_thompson5910(35256)

Question 178093: find m and n m+n+126=180
Click here to see answer by Mathtut(3670)

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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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, 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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, 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