SOLUTION: Solve this equation by gauss elimination method x+y+z=1, 2x-y+7z=7, 3x-y+2z=2

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Question 1020197: Solve this equation by gauss elimination method x+y+z=1,
2x-y+7z=7,
3x-y+2z=2
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Add -2%2AR1 to R2,
Add -3%2AR1 to R3,
x%2By%2Bz=1
0x-3y%2B4z=4
0x-4y-z=-1
Add -%284%2F3%29%2AR2 to R3,
x%2By%2Bz=1
0x-3y%2B4z=4
0x%2B0y-%2819%2F3%29z=%28-19%2F3%29
So then from row 3,
z=1
and
-3y%2B4=4
-3y=0
y=0
and
x%2B0%2B1=1
x=0