Homework Help: math

Posted by Amanda on Wednesday, November 11, 2009 at 3:00pm.

Solve by elimination method.

2r-5s=-33
5r+2s=48

Solve by substitution method.

5x+6y=5
x-9y=40

I always get these two confused... can someone please help me with these two problems?? I would really appreciate it..

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