SOLUTION: solve by addition method. x-4y=3 x+7y=-8

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Question 1116563: solve by addition method.
x-4y=3
x+7y=-8
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
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x-4y=3
x+7y=-8
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system%28x-4y=3%2C-x-7y=8%29
%28x-4y%29%2B%28-x-7y%29=11
-11y=11
highlight%28y=-1%29
-
system%287x-28y=21%2C4x%2B28y=-32%29, and you may know what to do next...