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December 21, 2014

December 21, 2014

Posted by **ina** on Sunday, February 14, 2010 at 6:05pm.

7r-9s=4

9r+7s=98

- algebra -
**bobpursley**, Sunday, February 14, 2010 at 6:15pmmultipy the first equation by 7, and the second equation by 9.

Then add the equations

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