Can someone please help me. I need help "solving the system"
2x+y+z=9
-x-y+z=1
3x-y+z=9

Can someone please help me. I need help "solving the system"
2x+y+z=9
-x-y+z=1
3x-y+z=9

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Start off by adding line one and line two; and now you have at least the y disappearing.

I did that. I did it with 1st and 3rd to get 5x+2z=9

Then I went and did it to the 1st and 2nd. Giving me x+2z=10

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