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December 20, 2014

December 20, 2014

Posted by **Sam** on Tuesday, September 25, 2012 at 3:20pm.

4x-y=5

4x+4y=-4

- algebra -
**Scott**, Tuesday, September 25, 2012 at 7:46pmsubtract the two equations to ELIMINATE the x-term

-5y = 9 __ y = -9/5

substitute back to find x

4x + 9/5 = 5

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