SOLUTION: Solve by matrix method x+y-z=1, 3x+y-2z=3,x-y-z=-1

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Question 1081706: Solve by matrix method
x+y-z=1, 3x+y-2z=3,x-y-z=-1
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
A=%28matrix%283%2C3%2C%0D%0A1%2C1%2C-1%2C%0D%0A3%2C1%2C-2%2C%0D%0A1%2C-1%2C-1%29%29
abs%28A%29=2
.
.
A%5Bx%5D=%28matrix%283%2C3%2C%0D%0A1%2C1%2C-1%2C%0D%0A3%2C1%2C-2%2C%0D%0A-1%2C-1%2C-1%29%29
abs%28A%5Bx%5D%29=4
.
.

A%5By%5D=%28matrix%283%2C3%2C%0D%0A1%2C1%2C-1%2C%0D%0A3%2C3%2C-2%2C%0D%0A1%2C-1%2C-1%29%29
abs%28A%5By%5D%29=2
.
.

A%5Bz%5D=%28matrix%283%2C3%2C%0D%0A1%2C1%2C1%2C%0D%0A3%2C1%2C3%2C%0D%0A1%2C-1%2C-1%29%29
abs%28A%5Bz%5D%29=4
.
.
So,
x=abs%28A%5Bx%5D%29%2Fabs%28A%29=4%2F2=2
y=abs%28A%5By%5D%29%2Fabs%28A%29=2%2F2=1
z=abs%28A%5Bz%5D%29%2Fabs%28A%29=4%2F2=2