SOLUTION: Please help solve these system of equations? x + y + z = ­1 2x + 4y + z = 1 x + 2y ­ 3z = ­3

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Question 1028051: Please help solve these system of equations?
x + y + z = ­1
2x + 4y + z = 1
x + 2y ­ 3z = ­3
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Use Cramer's rule,
A=%28matrix%283%2C3%2C%0D%0A1%2C1%2C1%2C%0D%0A2%2C4%2C1%2C%0D%0A1%2C2%2C3%29%29
abs%28A%29=6
.
.
.
A%5Bx%5D=%28matrix%283%2C3%2C%0D%0A1%2C1%2C1%2C%0D%0A1%2C4%2C1%2C%0D%0A3%2C2%2C3%29%29
abs%28A%5Bx%5D%29=0
.
.
.
A%5By%5D=%28matrix%283%2C3%2C%0D%0A1%2C1%2C1%2C%0D%0A2%2C1%2C1%2C%0D%0A1%2C3%2C3%29%29
abs%28A%5By%5D%29=0
.
.
.
A%5Bz%5D=%28matrix%283%2C3%2C%0D%0A1%2C1%2C1%2C%0D%0A2%2C4%2C1%2C%0D%0A1%2C2%2C3%29%29
abs%28A%5Bz%5D%29=6
.
.
.
So,
x=abs%28A%5Bx%5D%29%2Fabs%28A%29=0%2F6=0
y=abs%28A%5By%5D%29%2Fabs%28A%29=0%2F6=0
z=abs%28A%5Bz%5D%29%2Fabs%28A%29=6%2F6=1