SOLUTION: I am having trouble finding the solution set on problems like this: x+y+z=2 3x-y-4z=31 -x-y-5z=-14

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Question 769781: I am having trouble finding the solution set on problems like this:
x+y+z=2
3x-y-4z=31
-x-y-5z=-14
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
I am having trouble finding the solution set on problems like this:
x+y+z=2
3x-y-4z=31
-x-y-5z=-14
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Add eqn 1 to eqn 3.
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etc.
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If you need more help, email via the Thank You note.
Don't bother emailing if you don't do what I said above.