SOLUTION: x-2y+z=11 3x+2y-z=7 x+2y+4z=9

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Question 1095046: x-2y+z=11
3x+2y-z=7
x+2y+4z=9

Found 2 solutions by Alan3354, ikleyn:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
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Answer by ikleyn(52814) About Me  (Show Source):
You can put this solution on YOUR website!
.
To solve this system, start by adding the first and the second equations.

Then look what will happen.