Wednesday
September 17, 2014

Homework Help: Math Systems

Posted by Sam on Saturday, April 6, 2013 at 6:39pm.

I cannot solve these last three systems. Could you show me the work for them so i understand how to do them.
1)
x-y=1
2x+y=5
3x-4y=2

2)
5x+8y+6z=14
2x+5y+z=12
-3x+6y-12z=20

3)
x^2+2xy-2y^2=-11
x^2+xy-2y^2=-9

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