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September 21, 2014

September 21, 2014

Posted by **B.B.** on Saturday, April 17, 2010 at 12:19pm.

Solve by the elimination method.

7r-9s= -58

9r+7s=74

I know that I need to multiply the first equation by 9 and the second equation by 7.

The equations look like this:

63r-81s= -522

63r+49s=518

After this I get confused. Could someone please help?

Thanks.

- Math -
**bobpursley**, Saturday, April 17, 2010 at 12:24pmsubtract

0r-130s=-1040

- Math -
**B.B.**, Saturday, April 17, 2010 at 12:35pmBut how would I solve for r?

s=8 does that mean r=0?

Thanks.

- Math -
**B.B.**, Saturday, April 17, 2010 at 12:37pmNever mind I got the answer for r.

Thanks.

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