SOLUTION: Solve by the addition method. x-y=15 x+y=7

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Question 327213: Solve by the addition method.
x-y=15
x+y=7
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Add the equations to eliminate y.
x-y%2Bx%2By=15%2B7
2x=22
highlight%28x=11%29
Then use either equation to solve for y.
11%2By=7
highlight%28y=-4%29