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moahave
May 4, 2011, 10:21 AM
7x+2y=10
-7+y=-16
Unknown008
May 4, 2011, 11:06 AM
There seems to be a problem with your question; namely an x missing.

7x + 2y = 10
-7x + y = -16

Add those two equations together. What do you get? :)