Questions on Algebra: Systems of Linear Equations answered by real tutors!

Tutors Answer Your Questions about Linear-systems (FREE)

Question 635471: I have to solve the system of equationg
7x+5y=10
-2x+2y=4
Please help, thank you :)
Click here to see answer by stanbon(75887)

Question 635586: solve the following system of equation 2x-3y=13 and 5x+2y=4
Click here to see answer by stanbon(75887)

Question 635630: If f(x)=x^2+3x, find f(2-a)
Click here to see answer by unlockmath(1688)

Question 635642: Solve the system of linear equations 2x-5y=16 and 4x+3y=6 by using elimination.
Click here to see answer by mananth(16946)

Question 635665: Find the inverse of f(x)=5x-4
Click here to see answer by jim_thompson5910(35256)

Question 635662: Solve 4x^2-4x=24
Click here to see answer by reviewermath(1029)

Question 635664: Factor 4n^2+20n+25 completely.
Thank you for taking the time to help me!!
Click here to see answer by reviewermath(1029)

Question 635776: in the following system of equations, what does y equal?
8x + 5y=5
4x + y=9
Click here to see answer by ewatrrr(24785)

Question 635879: 6x-4y=16
9x-6y=24
eliminate method
Click here to see answer by checkley79(3341)

Question 635972: solve for x, please show work:
1) 15x^2-8x-12=0
2) x^2-10=3x
3) 4-6(2x-8)=x-9
factor, please show work:
4) x^2-16 answer = {-4,4} I don't know if that is the correct answer
5) 3x^2-22x+7
Click here to see answer by sachi(548)

Question 636130: How do I do a 3 variable equation in Linear system. Example: 3x + 3y + 6z = 27 along with two other 3 variable equations.
Click here to see answer by ewatrrr(24785)

Question 636217: System of linear equations word problem. Help please!
An Investment of 54,000 was made by a club. It was split into three parts lasting only year. The first part of the investment earned 8% interest, the second 6%, and the third 9%. Total interest from investments was $4260. The interest from the first was 6 times from the second. Find the amounts of the three parts of the investments.

Click here to see answer by MathTherapy(10552)

Question 636407: Solve l 2-3x l <=4...Solve absolute value sign 2-3x absolute value sign is less than or equal to 4.
Click here to see answer by stanbon(75887)

Question 636430: I Really Need Help! It's Friday and i have tons of homework! I need help with Find the value of x or y so that the line passing through the two points has the given Slope! PLEASE EXPLAIN THIS STEP BY STEP, I SUCK AT MATH
Problem: ( -3 , y ), ( -9 , -2 ); m = 1
also ( 7 , 5 ), ( x , 2 ); m =
Click here to see answer by MathTherapy(10552)

Question 636575: solve 2x^2-10x
Click here to see answer by MathLover1(20850)

Question 636894: y/12+1/6=y/2-1/4
Click here to see answer by jim_thompson5910(35256)

Question 637104: Using the addition method, how do I solve for 1/4x+1/3Y=5 and x-y=6?
Click here to see answer by ewatrrr(24785)

Question 637104: Using the addition method, how do I solve for 1/4x+1/3Y=5 and x-y=6?
Click here to see answer by DrBeeee(684)

Question 637131: 2x-4y=40
8x-3y=82
Is there no solution for this problem? I can't come up with anything that works. I need to show work but can't solve it. Thanks
Click here to see answer by jim_thompson5910(35256)

Question 637179: Help please! I tried this problem for hours and I couldn't figure it out. Also I need this problem done in in linear combination (elimination).
-3x-10y=9
14x+18y=-22
Thanks!
Click here to see answer by jim_thompson5910(35256)

Question 637228: 5m+n=5
9m-4n=-20
Click here to see answer by reviewermath(1029)

Question 637210: How to create a quick graph and solve using elimination or substitution.
3x-10y=16
x=-6y
Click here to see answer by meetkisai(17)

Question 637208: How to create a quick graph and solve using elimination or substitution.
2x-4y=18
3x-y=22
Click here to see answer by lynnlo(4176)

Question 637294: find an equation of the line that passes through (0,2)and is parallel to y=1/4x+6

Click here to see answer by meetkisai(17)

Question 637308: solve the following equation :2(2x+1)+5=3(2x+1)

Click here to see answer by lynnlo(4176)

Question 637308: solve the following equation :2(2x+1)+5=3(2x+1)

Click here to see answer by lenny460(1073)

Question 637473: Solve the system graphically or algebraically.
x-y=3
x-y^2=1
Click here to see answer by stanbon(75887)

Question 637598: i dont understand..
-54x-60y=6
-72x-80y=8
Click here to see answer by w_parminder(53)

Question 637856: how do i do this math problem ?
3(y+5)=8y
Click here to see answer by reviewermath(1029)

Question 638108: how to solve 4x+2y=10 and x-y=13 with substitution
Click here to see answer by MathLover1(20850)

Question 638335: I need help with solving this system of equation by substitution.
2x-4y=40
8x-3y=82
Thanks!
Click here to see answer by josh_jordan(263)

Question 638620: method of substitution 3a=5-b and 3a=2-b
Click here to see answer by MathLover1(20850)

Question 638846: how would i solve for
5/4 greater than or equal to -1/8
Click here to see answer by MathLover1(20850)

Question 638904: how do i solve with substitution?
2x+3y=7
4x+3y=13
Click here to see answer by reviewermath(1029)

Question 639160: Solve.
2x - y - 3z = -1
2x - y + z = -9
x + 2y - 4z = 17
I got so far as;
2x - y - 3z = -1
4z = -8
3y - 5z = 35
Please help.
Click here to see answer by Tatiana_Stebko(1539)

Question 639160: Solve.
2x - y - 3z = -1
2x - y + z = -9
x + 2y - 4z = 17
I got so far as;
2x - y - 3z = -1
4z = -8
3y - 5z = 35
Please help.
Click here to see answer by Alan3354(69443)

Question 639177: Solve.
2x - 3y + z = 5
x + 3y + 8z = 22
3x - y + 2z = 12
I've tried it by: Multiplying the second equation by 2 and the third equation by 2; as well as multiplying the second equation by 4 and the third equation by 2 but neither seemed to work. Please help.
Click here to see answer by solver91311(24713)

Question 639187: I don't understand the systems
8x+4y=6
4x=3-y
I got the answers x=6/8 and y=0 im not sure if I did it correctly.
Click here to see answer by solver91311(24713)

Question 639187: I don't understand the systems
8x+4y=6
4x=3-y
I got the answers x=6/8 and y=0 im not sure if I did it correctly.
Click here to see answer by MathLover1(20850)

Question 639367: Hi! I'm supposed to write an equation for the line. the problem is Through (7,-9), perpendicular to 2x+7y=-49. Please help me!
Click here to see answer by mananth(16946)

Question 639462: I'm not sure if this is in the correct section, but I really need help as soon as possible. I am having trouble with this equation:
a = b + bcd, solve for b
What am I supposed to do? The teacher didn't talk about this, and I have looked back in the book, but I can't figure it out.
Thank you so much!
Click here to see answer by reviewermath(1029)

Question 639473: I need some help with this problem as soon as possible. I'm having a lot of trouble, and my parents haven't been able to help either. Thank you all for your help! :)
solve for x

Click here to see answer by Alan3354(69443)

Question 639692: Solve using the substitution method. Show your work. If the system has no solution or an infinite number of solutions, state this.
4x + 4y = -36
4x + 4y = 12
Click here to see answer by reviewermath(1029)

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