SOLUTION: how do you do this problem x+y=13 x-y=-5

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Question 466437: how do you do this problem
x+y=13
x-y=-5
Answer by jorel1380(3719) About Me  (Show Source):
You can put this solution on YOUR website!
You add the equations together:
x+y=13
x-y=-5
2x=8
x=4
y=9..