SOLUTION: how do you solve this x+y=9 -2x+y=-3

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Question 236299: how do you solve this
x+y=9
-2x+y=-3

Answer by rfer(2688) About Me  (Show Source):
You can put this solution on YOUR website!
x+y=9, y=-x+9
-2x+y=-3
-2x-x+9=-3
-3x=-12
x=4
-----------------
4+y=9
y=5
---------------
-2*4+5=-3
-8+5=-3