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April 21, 2014

April 21, 2014

Posted by **Colby** on Tuesday, September 7, 2010 at 10:45pm.

n+(-7)-n=

- Math -
**bobpursley**, Tuesday, September 7, 2010 at 10:48pmYour second line makes no sense. n-7-n=-7

- Math -
**Ms. Sue**, Tuesday, September 7, 2010 at 10:48pmn+(-7)-n=

-15 + (-7) + 15 = -7

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