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December 19, 2014

December 19, 2014

Posted by **jririfi** on Sunday, July 20, 2014 at 3:04pm.

3x – y = –12

x + 2y = –18

- Math -
**Reiny**, Sunday, July 20, 2014 at 3:22pmdouble the first:

6x - 2y = -24

x + 2y = -18

add them:

7x = -42

x = -6

back into the second:

-6 + 2y = -18

2y = -12

y = -6

x = -6 , y = -6

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