SOLUTION: Using Cramer's rule solve the following systems. (B)x + y + z =6 3x-y+2z=7 3y-4z=-6

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Question 1074476: Using Cramer's rule solve the following systems.
(B)x + y + z =6
3x-y+2z=7
3y-4z=-6
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
A=%28matrix%283%2C3%2C%0D%0A1%2C1%2C1%2C%0D%0A3%2C-1%2C2%2C%0D%0A0%2C3%2C-4%29%29
abs%28A%29=-13
.
.
.
A%5Bx%5D=%28matrix%283%2C3%2C%0D%0A6%2C1%2C1%2C%0D%0A7%2C-1%2C2%2C%0D%0A-6%2C3%2C-4%29%29
abs%28A%5Bx%5D%29=-85
.
.
.
A%5By%5D=%28matrix%283%2C3%2C%0D%0A1%2C6%2C1%2C%0D%0A3%2C7%2C2%2C%0D%0A0%2C-6%2C-4%29%29
abs%28A%5By%5D%29=-50
.
.
.
A%5Bz%5D=%28matrix%283%2C3%2C%0D%0A1%2C1%2C6%2C%0D%0A3%2C-1%2C7%2C%0D%0A0%2C3%2C-6%29%29
abs%28A%5Bz%5D%29=57
.
.
.
So then,
x=abs%28A%5Bx%5D%29%2Fabs%28A%29=85%2F13
y=abs%28A%5By%5D%29%2Fabs%28A%29=50%2F13
z=abs%28A%5Bz%5D%29%2Fabs%28A%29=-57%2F13