SOLUTION: x+3y+z=9 3x+y-z=-1 2x+2y-z=3

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Question 1134322: x+3y+z=9
3x+y-z=-1
2x+2y-z=3
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
x+3y+z=9
3x+y-z=-1
2x+2y-z=3
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Add eqns 1 & 2, then eqns 1 & 3.
---> 2 eqns in x & y, no more z.
Go from there.