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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 255417: 7x+2y=24
8x+2y=30
Click here to see answer by jim_thompson5910(35256)

Question 255519: How Do I Solve Linear Equations Like: 2y-5x=10
Click here to see answer by richwmiller(17219)

Question 254127: Please solve for w, x, y, and z.
1. x + 3w = 4
2y - z -w = 0
3y - 2w = 1
2x - y + 4z =5
2. x + y + z + w = 6
2x + 3y - w = 0
-3x + 4y + z + 2w = 4
x + 2y -z +w = 0
Click here to see answer by CharlesG2(834)

Question 255581: is (2,2-2) a solution to the equation 3x-2y=10 ?
Click here to see answer by drk(1908)

Question 255664: what is a system equation and how do you solve?
Click here to see answer by richwmiller(17219)

Question 255484: 4x+2y=-2
3x-4y=-18
Click here to see answer by EMStelley(208)

Question 255722: how do i solve this system that has three variables?
x+5y-z=16
3x-3y+2z=12
2x+4y+z=20
Click here to see answer by jim_thompson5910(35256)

Question 255760: May i have help finding a answer here is my question.... it says to rewrite the equation in function form the question is -3x + y = 12
Click here to see answer by stanbon(75887)

Question 255819: i do not understand the graphing part.
Click here to see answer by solver91311(24713)

Question 255824: I don't understand. Can you help me?
Find the slope of a line parallel to the graph of this equation.
y=4x+2

Click here to see answer by solver91311(24713)

Question 255824: I don't understand. Can you help me?
Find the slope of a line parallel to the graph of this equation.
y=4x+2

Click here to see answer by Greenfinch(383)

Question 255829: how do i find the equation of a line through two points, (4,3) and (2,4)? Please explain, the book says the answer is y=-1/2x+5 but I don't get how they got -1/2 and 5.
Click here to see answer by Greenfinch(383)

Question 255910: 10 + 4a < -6
Click here to see answer by unlockmath(1688)

Question 255885: when does a system of linear equations has a unique solution? no Solution? and Infinitely many solutions?

Click here to see answer by checkley77(12844)

Question 256092: how do I find the slope of 2x +3y =15
Click here to see answer by stanbon(75887)

Question 256144: Alicia is the lead attorney in an insurance law department. She supervises 26 attorneys and 11 paralegals. One supervisory matter has to be created based upon the hours worked on by the attorneys and paralegals, totaling 540 hours. How many matter were used to create the one supervisory matter needed?
I can't figure out how to write out the problem here.
Click here to see answer by richwmiller(17219)

Question 256160: (10,-6) and (-2,-6)
Click here to see answer by Alan3354(69443)

Question 256255: Trying to help my child and I do not understand how to solve these problems.
Equations as follows:
y= x-1
y= -x +7

Can you please show solution with explanation so I understand where the answers (numbers) came from and how these problems are solved?
Click here to see answer by scott8148(6628)

Question 256336: The degree measures of the angles of(triangle)ABC are represented by x degrees, 2x degrees and (6x-54)degrees. Find the measure of the largest angle.
Click here to see answer by unlockmath(1688)

Question 256334: Solve for x and y.
3x + 2y = 100
4x + 3y = 135
Click here to see answer by Fombitz(32388)

Question 256461: 3x+5y=16
2x- y=2
Click here to see answer by richwmiller(17219)

Question 256461: 3x+5y=16
2x- y=2
Click here to see answer by stanbon(75887)

Question 256463: Alicia has 3 law units she supervises and has been assigned 11 additional attorneys. Each law unit has the same number of attorneys. Altogether there are 47 attorneys. HOW MANY ATTORNEYS ARE IN EACH LAW UNIT?
Click here to see answer by richwmiller(17219)

Question 256489: Solve for X, Y, and Z in the following systems of three equations using either substition or elimination methods: 10X + Y + Z = 12, 8X + 2Y +Z = 11, 20X - 10Y - 2Z = 8

Click here to see answer by Edwin McCravy(20056)

Question 255901: Directions say to use a system to solve the system of equations. Here are the two equations given.
-5x + 3y = 6 and x - y = 4
Click here to see answer by richwmiller(17219)

Question 256338: Triangle DEG has the coordinates D(-1,1), E(5,-1) and G(4,5) Triangle DEG is rotated 90degrees about the origin to form triangleD'E'G'. State the coordinates of the vertices D', E', and G'.
Click here to see answer by Edwin McCravy(20056)

Question 256592: Please help me with solving this problem by the addition method.
6x + 15y = -45
6x + 5y = -35
This is what I tried to do: 6x + 15y = -45
6x + 5y = -35

12x + 20y =-75
Click here to see answer by palanisamy(496)

Question 256626: solve the linear system by graphing. Check your solution
-6x + y = 33
2x - 8y = -34
Click here to see answer by stanbon(75887)

Question 256628: Kate is three years less than twice as old as her brother Brett. Next year Bretts age will be three fourths Kates age. How old is each now?

Click here to see answer by stanbon(75887)

Question 256559: y= 1x + 4
y= 2x - 8
Click here to see answer by checkley77(12844)

Question 256661: Please help me with solving this problem. I am confused because it started out with equal first:8x = 9 -5y
8x - 3y = -31
Do I turn it around to solve like this: 9 - 5y = 8x
8x -3y = -31
8x-8x=0
5y - 3y = 2y
80 - 31= 49
8x = 0

8x - 3y = -31
I am sorry, I am stuck. Thank you for your help.

Click here to see answer by vleith(2983)

Question 256838: what are the x- and y-intercepts of the line with equation 4x+5y+40?

Click here to see answer by richwmiller(17219)

Question 256838: what are the x- and y-intercepts of the line with equation 4x+5y+40?

Click here to see answer by checkley77(12844)

Question 256874: Write the equation of the line L that satisfies the given geometric conditions. L has y-intercept (0, -3) and is parallel to the line with equation.
Help, what are the steps to solving this?
Click here to see answer by richwmiller(17219)

Question 256881: Write the equation of the line L that satisfies the given geometric conditions. L has y-intercept (0, -3) and is parallel to the line with equation y= 2/3x + 1
Click here to see answer by richwmiller(17219)

Question 256926: 2x+y=4
3x-y=11
Click here to see answer by Fombitz(32388)

Question 256989: i don't understand how substitution works. can anyone explain to me in a easy way?
Click here to see answer by richwmiller(17219)

Question 257088: (2s-3t)^2-(s+5t)^2
what is s and t?
Click here to see answer by stanbon(75887)

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