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

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Question 317497: Solve each system by addition.
x + y = 7
x – y = 9
Answer by JBarnum(2146) About Me  (Show Source):
You can put this solution on YOUR website!
add them together
2x+0=16 divide by 2
x=8
can also subtract them
2y=-2
y=-1