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September 21, 2014

September 21, 2014

Posted by **Donna** on Thursday, November 11, 2010 at 6:25pm.

m - 2n = 16,

4m + n = 1

- Intermediate Algebra -
**Reiny**, Thursday, November 11, 2010 at 6:37pmthis one is not hard to solve,

mentally double the second equation and add that result to the first one ...

9m = 18

m = 2

mentally sub that into the second equation...

8+n=1

n = -7

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