SOLUTION: Solve each system by addition. x + y = 7 x - y = 9

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Question 321256: Solve each system by addition.
x + y = 7
x - y = 9
Found 2 solutions by Alan3354, checkley77:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Make an effort, show your work.
Tutoring is not doing problems for you.

Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
x + y = 7
x - y = 9
---------------
2x=16
x=16/2
x=8 ans.
8+y=7
y=7-8
y=-1 ans
Proof:
8-(-1)=9
8+1=9
9=9