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March 30, 2015

March 30, 2015

Posted by **Math** on Sunday, July 20, 2014 at 3:02pm.

5x - y = 18

–4x – 2y = –6

- Algebra -
**Reiny**, Sunday, July 20, 2014 at 3:19pmI would use substitution, from the 1st:

y = 5x-18

sub into the 2nd:

-4x - 2(5x-18) = -6

-4x - 10x + 36 = -6

-14x = -42

x = 3

y = 5(3)-18 = -3

x=3 , y = -3

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