SOLUTION: simultaneous equations x-y=4 2x+y=5

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Question 170936: simultaneous equations
x-y=4
2x+y=5
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
x-y=4
2x+y=5 add
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3x=9
x=9/3
x=3 ans.
3-y=4
-y=4-3
-y=1
y=-1 ans.
Proof:
2*3-1=5
6-1=5
5=5