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January 30, 2015

January 30, 2015

Posted by **wan** on Sunday, June 29, 2014 at 7:21am.

- mat/simultaneous equation -
**Reiny**, Sunday, June 29, 2014 at 8:31amI would use elimination here

1st times 3 ---> 6x - 15y = 39

2nd times 5 --> 25x - 15y = -75

subtract them:

-19x = 114

x = -6

back into 1st

-12 - 5y = 13

-5y = 25

y = -5

x = -6 , y = -5

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