SOLUTION: Use matrices to solve the system of equation. 3x+4y=-12 9x-2y=6

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Question 917672: Use matrices to solve the system of equation.
3x+4y=-12
9x-2y=6
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
A=%28matrix%282%2C2%2C3%2C4%2C9%2C-2%29%29
abs%28A%29=-42
.
.
A%5Bx%5D=%28matrix%282%2C2%2C-12%2C4%2C6%2C-2%29%29
abs%28A%5Bx%5D%29=0
.
.
A%5By%5D=%28matrix%282%2C2%2C3%2C-12%2C9%2C6%29%29
abs%28A%5By%5D%29=126
.
.
x=abs%28A%5Bx%5D%29%2Fabs%28A%29=0%2F%28-42%29=0
.
.
y=abs%28A%5By%5D%29%2Fabs%28A%29=126%2F%28-42%29=-3