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

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

Question 18296: what is the answer to the equation 9-14x=51
Click here to see answer by Alwayscheerful(414)

Question 19059: A teller has 36 rolls of coins in his drawer, consisting of quarters($10 per roll), dimes($5 per roll), and nickels($2 per rolls). He has three times as many rolls of quaters as nickels and twice as many rolls of dimes as nickels. The total is $252. How many rolls of each does he have?
Click here to see answer by vasha912(1)

Question 19331: what is this problem for the i need help please. x divided by 3 minus 6 equal x divided by 9?
Click here to see answer by mmm4444bot(95)

Question 19214: How to determine whether a given ordered pair is a solution of an equation in two variables

Click here to see answer by mmm4444bot(95)

Question 19330: 6=2x+5
Click here to see answer by mmm4444bot(95)

Question 19320: 2x-3y+5z=-5, 2y-3z=4, and 4z=-8
Click here to see answer by akmb1215(68)

Question 19339: I need help with simplifying expressions with fractions such as:
( 35 - 10q) ( - 2/5)
Click here to see answer by xcentaur(357)

Question 19382: Hi I have a problem with a this question that I need help with.
(1)Translate into a variable expression "and" simplify:
"three times the difference of twice a number and twelve",

Click here to see answer by MILIAJEY(4)

Question 19401: ` ` ` b-a
b = ` ---
` ` ` `a
`
solve for b
`
Please help me solve this formula. I am confused because there are 2 bs and I do not know what to do with them. I typed it as clear as I could it is b equals b-a over a.
Thank you

Click here to see answer by longjonsilver(2297)

Question 19408: 7/8 (32 + 16x) = -7x-14
Click here to see answer by sukusu(21)

Question 19491: 11x+4=-x+16. i know the anwser but don't understand how to work it out easily?
3(x+2)=4(2+x) same thing

Click here to see answer by MelanieBCC(40)

Question 19525: find two cosecutive odd integers whose sum is 72
Click here to see answer by Paul(988)

Question 19546: A passenger train's speed is 60 mi/h, and a freight train's speed is 40 mi/h. The passenger train travels the same distance in 1.5 h less time than the freight train. How long does each train take to make the trip?
Click here to see answer by Paul(988)

Question 19360: This is a problem i'm not quite understanding (more fractions! )
An eagle dives from its nest with a velocity of 8 1/3 ft per second . Find the vertical displacement in 4 1/2 seconds.
Click here to see answer by MelanieBCC(40)

Question 19559: Please solve:
(3x^2+5x).(X-1)
Click here to see answer by rahman(247)

Question 19591: 4Y(-3XY)
Click here to see answer by xcentaur(357)

Question 19674: I am helping in after school tutoring and I want to be sure I am correct-
when you do an equation such as : 5z squared + 9z squared = 504
what do you do with the exponents?
Click here to see answer by wuwei96815(245)

Question 19676: when you have an equation like 1/4x+5=28, and you have to find x, how do you get rid of the fraction?
Click here to see answer by MelanieBCC(40)

Question 19664: 30x^2y^3/-6x^3y^2
Click here to see answer by rahman(247)

Question 19876: 9x-(3x-2)+10=0
Click here to see answer by rahman(247)

Question 19859: Please help me solve this problem.
19-(2x+3)=2(x+3)+x
I tried but my answer was wrong
19-2x+3=2x+6+x
22-2x=3x+6
22-2x+-3x=3x+-3x+6
22-5x=6
22-22-5x=22-6
-5x=-16
x=-16/5
Click here to see answer by christinaaa192(28)

Question 19904: please solve this equation: I = prt , solve for p
Click here to see answer by piglet162431(90)

Question 20011: 15-(2x-7)=14

what is x = to???
Click here to see answer by wuwei96815(245)

Question 20021: The Lions have won 40 of their first 74 baseball games. How many of the remaining 66 games must the team win to win 60% of their first games?
Click here to see answer by kunal_122(19)

Question 20022: 39-12w=7-16w
Click here to see answer by elima(1433)

Question 20003: x-2/3=x
Click here to see answer by pwac(253)

Question 20190: -10=1/2y+y
Click here to see answer by christinaaa192(28)

Question 20170: x-y=2
4x-3y=11
How do I solve the sytem of equation using the subsitution method? Please show the work!
Click here to see answer by elima(1433)

Question 20169: y=-x+5
x-4y=10
How do I solve the sytem of equation using the subsitution method? Please show the work!
Click here to see answer by elima(1433)

Question 20165: y=2x
x+y=12
How do I solve the system of equation using the substitution method?
Click here to see answer by elima(1433)

Question 20168: 2x-3y=12
x=4y+1
How do I solve the sytem of equation using the subsitution method? Please show the work!
Click here to see answer by christinaaa192(28)

Question 20166: x=3y-1
x+2y=9
How do I solve the sytem of equation using the subsitution method? Please show the work!
Click here to see answer by christinaaa192(28)

Question 20232: 2(x+3.1)=9.8

How do I solve????
Click here to see answer by Alwayscheerful(414)

Question 20224: Please help me solve this worksheet problem. I get confused when working with negative numbers. I must find the solutions. What number is 6 less than Negative 4.

My first step was :x= (-4) - 6
x= -10
Please let me know if this is the correct way to solve the equation. Thank you very much for your help!!
Click here to see answer by wuwei96815(245)

Question 20239: Please help me solve this worksheet problem. I get confused when working with negative numbers. I must find the solutions. What number is 6 less than Negative 4.

My first step was :x = (-4) - 6
x = -10
Please let me know if this is the correct way to solve the equation. Thank you very much for your help!!
Click here to see answer by Earlsdon(6294)

Question 20261: the sum of three consecutice numbers is 417. i ahve to write and solve an equation that will determine the three numbers. what are the three numbers? all i know is the numbers are in order and the equation looks something like x+y+z=471, but how do you figure that out?
Click here to see answer by elima(1433)

Question 20299:
Click here to see answer by trinityhs09(2)

Question 20538: I need to solve the following:
Write 8 expressions that have different results when they are evaluated. You must use all three numbers in each expression and each number can only be used once.
Thanks,
Teri
Click here to see answer by venugopalramana(3286)

Question 20563: The expression 2(1 + w) may be used to find the perimeter of a rectagle. What are the length and width of a rectangle if the area is 13 1/2 square feet and the length of one side is 1/5 the measure of the perimeter?

Thanks,
Teri
Click here to see answer by askmemath(368)

Question 20626: use substitution to solve the equation
n=3m-11
2m+3n=0
Click here to see answer by pwac(253)

Question 20713: What is the solution to -b+4b= 8b-b?
Click here to see answer by akmb1215(68)

Question 20838: waths the solution to 5m + 4 =8 - 7m
Click here to see answer by CertifiedGenius(6)

Question 20837: waths the solution to 5x -4x + 3=9 - x
Click here to see answer by CertifiedGenius(6)

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