SOLUTION: x+y=3 x-y=4

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Question 319276: x+y=3
x-y=4
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
1.x%2By=3
2.x-y=4
Add the equations together to eliminate y,
x%2By%2Bx-y=3%2B4
2x=7
highlight%28x=7%2F2%29
Then use either equation to solve for y,
7%2F2%2By=3
y=6%2F2-7%2F2
highlight%28y=-1%2F2%29