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Posted by **mema** on Thursday, June 9, 2011 at 8:56pm.

2x+2y=20

2x-2y=4

- algebra -
**PsyDAG**, Friday, June 10, 2011 at 3:26pmAdd the two equations.

2x+2y=20

2x-2y=4

4x = 24

I hope you can take it from there.

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