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April 21, 2015

April 21, 2015

Posted by **Anonymous** on Tuesday, May 3, 2011 at 11:23pm.

3x+2y=40

what is the solve of xy ?

- 8th grade math -
**bobpursley**, Wednesday, May 4, 2011 at 12:08amIn English, do you mean how do you solve for x and y?

multipy the top equation by 2, and the bottom equation by 5

4x-10y=28

15x+10y=200

then add the equations...

19x+0y=228

divide each side by 19

x=228/19=12

Now go back to either of the original equations, but 12 in for x, and solve for y.

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