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February 28, 2015

February 28, 2015

Posted by **Megan** on Friday, April 18, 2008 at 6:07pm.

Sum of three numbers is -5. First, minus second, plus 4 times the third is -20. The third plus 4 times the first plus the second is -20.

- Math -
**Reiny**, Friday, April 18, 2008 at 6:28pma + b + c = -5

a - b + 4c = -20

4a + b + c = -20

looks like a very simple 3 equation in 3 variables question.

Hint: add the first two, then the last two, and go from there

I got a=-5

b=3

c=-3

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