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October 20, 2014

October 20, 2014

Posted by **adriana** on Tuesday, April 2, 2013 at 11:14pm.

x+y=4

- math -
**Lena**, Wednesday, April 3, 2013 at 2:35amx-y=0

x+y = 4

x+y+x-y=4+0

2x=4

x=2

Therefore y=2

x=2

y=2

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