Questions on Algebra: Expressions involving variables, substitution answered by real tutors!

Tutors Answer Your Questions about Expressions-with-variables (FREE)

Question 98408: 5x + 8 + 3x - x + 5 = 6x - 3
Click here to see answer by mathslover(135)

Question 98420: 1/4a-12=5/4a+6
I was working it out like this: 1/4a=5/4a+18 and then i didn't do anything because i didn't know what to do after that and i didn't know if it was right. My mom couldn't help me either. So will you please help me?
Click here to see answer by jim_thompson5910(28536)

Question 98478: Please help :) Greatly appreciated!
Given f(x)-5x^2-3x+1, find f(-2)
Click here to see answer by edjones(7569)

Question 98481: V=AT+S SOLVE FOR T
Click here to see answer by edjones(7569)

Question 98480: Help with one more :)
f(x)= -3x+1 ,find f (a-2)
Thanks!
Click here to see answer by jim_thompson5910(28536)

Question 98489: rewrite equation:
2x-3y = -6 as a function of x.
Thanks
Click here to see answer by jim_thompson5910(28536)

Question 98536: I am attepting to solve this equation, but am having difficulty.
2x + 15 = (-2x - 3) / x

Click here to see answer by stanbon(57282)

Question 98548: A clown weighs 60lb more than a trapeze artist.the trapeze artist weighs two thirds as much as the clown.How much does each weigh.
choices for the weigh of the trapeze artist.110,120,125
Click here to see answer by WannabeCAgirl83(35)

Question 98547: A bus went 318 km farther than a car.The car went one third as far as the bus.How far did each vehicle travel.
Choices 147,151,159
Click here to see answer by edjones(7569)

Question 98558: s=3 t=9
s(3t+6)=60
Click here to see answer by checkley71(8403)

Question 98566: This problem does not come from a book, but I would appreciate it very much if you can solve it as I have a deadline tonight! Thanks so much~
Rewrite the equation below in general form Ax + By = C where A, B and C are the smallest integers possible and A > 0.
Enter the variable expression Ax + By separately from the constant term C.
y = 4/7(x) + 2/17

Click here to see answer by stanbon(57282)

Question 98603: 3-4q=10q+10
Click here to see answer by jim_thompson5910(28536)

Question 98627: 9+s=-5
Click here to see answer by checkley71(8403)

Question 98506: y1=1/x+3, y2=1/x, and y1+y2=1/15
Find all the values of x
Click here to see answer by malakumar_kos@yahoo.com(315)

Question 98733: if a=4 and c=7 what is 3ac?
Click here to see answer by Adam(64)

Question 98733: if a=4 and c=7 what is 3ac?
Click here to see answer by checkley71(8403)

Question 98530: gym is 21 years newer than the auditorium. the gym is also one fourth as old as the auditorium. how old is each building? choices for auditorium age: 26, 27, 28
write and equation to
Click here to see answer by edjones(7569)

Question 98765: Please help me solve for the unknowns (a and b):
Two numbers added together are 185. The difference between them is 57.
Here is the work that I have done so far:
a+b=185
a-b=57
Please help me. Thank you.

Click here to see answer by stanbon(57282)

Question 98778: 4m^2-2m
how do you write it in a verbal expression?
Click here to see answer by elima(1433)

Question 98811: The ninth grade class has 17 more girls than boys.There are 431 students in all.How many boys are there?How many girls are there? Choices for number of boys:191, 202, 207.
Click here to see answer by doukungfoo(195)

Question 98822: okay heres my problem ive tried to solve it but it keeps coming out wrong....
18x - (8x - 7) = 67

and also this one....
11 ( 4 - 6y) + 5 ( 13y + 11) = 9
Click here to see answer by doukungfoo(195)

Question 98812: Western State College is 18 years older than Southern State.Western is also 2 1/2 times as old as Southern. How old is each?
Choices for Southern State's age: 12,14,18
Click here to see answer by doukungfoo(195)

Question 98892: -4(2x-3) = -8x+5
solve and check result
Click here to see answer by Adam(64)

Question 98969: 6x-4(9-x)=106 ;7
Click here to see answer by stanbon(57282)

Question 99004: How do you solve the expression: A number diminished by 5
Click here to see answer by stanbon(57282)

Question 99015: 9/5x98.6+32
Click here to see answer by stanbon(57282)

Question 98942: I need help for 4-(2x+5)=6x+31
Click here to see answer by doukungfoo(195)

Question 99048: A rectangle shelf is the square root of 440cm by the square root of 20cm. Find its area.
Click here to see answer by checkley71(8403)

Question 99026: A plane flies 720 mi against a steady 30-mi/h headwind and then returns to the same point with the wind. If the entire trip takes 10h, what is the plane's speed in still air?
Click here to see answer by checkley71(8403)

Question 99131: THis is the best I can type it out. I hope you understand it. 6x to the second power y to the third power + 9x to the second power y to the third power. divided by 3x to the second power y by the second power. Simplify it. It looks sort of like this.
Click here to see answer by ankor@dixie-net.com(15645)

Question 99177: The circumference of a circle is 8(3.14) ft. Find the radius of the circle.
Click here to see answer by checkley71(8403)

Question 99176: use two unit multipliers to convert 100 square yards to square feet
Click here to see answer by checkley71(8403)

Question 99229: you are taking a trip to Switzerland. you are at the bank exchanging $600 for swiss francs. the exchange rate is 1.5 francs per dollar, and the bank charges a 1.5% fee to make the exchange
a. you bought $10 extra with you to pay the exchange fee. do you have enough money?
b. how much will you receive in swiss francs for your $600?
c. after your trip, you have 321 swiss francs left. how much is this amount in dollars?
Click here to see answer by scottnascar(12)

Question 99259: How do you solve this problem? :
1/4x+2=3/4x
Click here to see answer by checkley71(8403)

Question 99278: how do you solve this? :
5/3+2/3x=25/12+5/4x+3/4
Click here to see answer by stanbon(57282)

Question 99047: Simplify each expression. Rationalize all denominators. Assume that all variables are positive.
cube root of 2x times cube root of 4 times cube root of 2x square
Click here to see answer by ankor@dixie-net.com(15645)

Question 99336: Kirsten built a rectangular corral with a fence on three sides.A side of the barn served as a short side of the corral.She used 130m of fencing.The length of the corral was 20m longer than the width. Find the dimensions of the corral.Choices for the widths:25, 30, 35.
Click here to see answer by bucky(2189)

Question 99421: how do I solve -9+x=16?
Click here to see answer by math-smartey1029(3)

Question 99447: In this expression I know that the first step is to find the common denominator. And that's where I stopped. Yeah. The expression has complex fractions and involves variables. It is . Where do I start? I believe that I multiply 6(x-2) by 6x however there's already a 6 in both denominators so do I just ignore this and multiply by (x-2)? I'm very confused. Can you help me?
Click here to see answer by stanbon(57282)

Question 99463: 8=4(3c+5)
Click here to see answer by doukungfoo(195)

Question 99462: This particular expression is... complicated. The original problem is I solved it down to then I don't know what to do. I tried factoring by grouping and that didn't simplify the expression so then I thought about canceling like terms but that doesn't work for 5x and 3x and then there's nothing for 12. So, my question is: Am I done solving? Or do I have miles to go?
Click here to see answer by edjones(7569)

Question 99273: How do you solve this? :
1/3x+1/2=5/6x
Click here to see answer by ankor@dixie-net.com(15645)

Question 99602: I am not sure how to do this. Can someone break it down so I can understand the steps it takes to come to the answer?
Use the Substitution method to solve the system of equations. Give your answer as an ordered pair (x,y).
x + y = -5
x - y = 3

Click here to see answer by elima(1433)

Question 99604: Solve the system of equations using the elimination method.
2a + 3b = -1
3a + 5b = -2
Click here to see answer by elima(1433)

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