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January 31, 2015

January 31, 2015

Posted by **shelbie** on Wednesday, March 21, 2012 at 5:23pm.

- math -
**bobpursley**, Wednesday, March 21, 2012 at 5:29pmmultipy both sides by -1

9x-1=80

add one to each side

9x=81

divide each side by 9

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