SOLUTION: X-y+3z=6 ×-2y=5 2x-2y+5z=9

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Question 1049311: X-y+3z=6
×-2y=5
2x-2y+5z=9
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%2C-1%2C3%2C%0D%0A1%2C-2%2C0%2C%0D%0A2%2C-2%2C5%29%29
abs%28A%29=1
.
.
.
A%5Bx%5D=%28matrix%283%2C3%2C%0D%0A6%2C-1%2C3%2C%0D%0A5%2C-2%2C0%2C%0D%0A9%2C-2%2C5%29%29
abs%28A%5Bx%5D%29=-11
.
.
.
A%5By%5D=%28matrix%283%2C3%2C%0D%0A1%2C6%2C3%2C%0D%0A1%2C5%2C0%2C%0D%0A2%2C9%2C5%29%29
abs%28A%5By%5D%29=-8
.
.
.
A%5Bz%5D=%28matrix%283%2C3%2C%0D%0A1%2C-1%2C6%2C%0D%0A1%2C-2%2C5%2C%0D%0A2%2C-2%2C9%29%29
abs%28A%5Bz%5D%29=3
.
.
.
So then,
x=abs%28A%5Bx%5D%29%2Fabs%28A%29=-11%2F1=-11
y=abs%28A%5By%5D%29%2Fabs%28A%29=-8%2F1=-8
z=abs%28A%5Bz%5D%29%2Fabs%28A%29=3%2F1=3