Posted by **Marcie** on Monday, October 19, 2009 at 7:24pm.

-5+15n-20-12=13

Can somebody please help?

- 8th grade -
**jim**, Monday, October 19, 2009 at 7:28pm
Answered below

- 8th grade -
**premal**, Monday, November 26, 2012 at 11:33am
molecules

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