SOLUTION: use an augmented matrix to solve each system of equations -2x+2y=-8 3x-y=4

Question 743578: use an augmented matrix to solve each system of equations
-2x+2y=-8
3x-y=4
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
Do it like this one.
---
use an augmented matrix to solve each system of equations
-x+y=9
-4x+y=6
-------------
|-1 +1 -9|
|-4 +1 -6|
-----------------
Det = -1 - (-4) = 3
-----
x*Det = -6 - (-9) = 3
x = 3/Det
x = 1
-----------
-y/Det = 6 - 36 = -30
y = 10

RELATED QUESTIONS
use an augmented matrix to solve each system of equations x+5y=-7... (answered by Alan3354)

use an augmented matrix to solve each system of equations 2x-2y=6... (answered by Alan3354)

use an augmented matrix to solve each system of equations 2y=10... (answered by Alan3354)

use an augmented matrix to solve each system of equations -x=-3... (answered by Alan3354)

use an augmented matrix to solve each system of equations -x+y=9... (answered by Alan3354)

solve each system by using an augmented matrix. x-2y+z=9 3x+y=1... (answered by swincher4391)

Given the following system of three equations, write as an augmented matrix. 3x - 2y + z (answered by Edwin McCravy)

Write the augmented matrix of the system to use the matrix method to solve the system. (answered by jsmallt9)

Write an augmented matrix for each system of equations. Then solve each system. (i) 2m (answered by Edwin McCravy)