SOLUTION: Solve using addition method x+3y+z=6 3x+y-z=-2 2x+2y-z=1

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Question 999145: Solve using addition method
x+3y+z=6
3x+y-z=-2
2x+2y-z=1
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Solve using addition method
x+3y+z=6
3x+y-z=-2
2x+2y-z=1
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Add eqn 1 and eqn 2.
Then add eqn 1 and eqn 3.
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That eliminates z, leaves 2 equations in x & y.
Can you do the rest?