SOLUTION: elimination / addition x + 5y = 7 -x + 7y = 17

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Question 448439: elimination / addition
x + 5y = 7
-x + 7y = 17
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
Add the two equations so that the x's cancel:

12y = 7 + 17 = 24 --> y = 2.

If we replace y into either equation (e.g. the first)we can get x = -3. Therefore (-3,2) is the solution.