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February 1, 2015

February 1, 2015

Posted by **sharday** on Thursday, February 23, 2012 at 11:41pm.

- algebra -
**MathMate**, Friday, February 24, 2012 at 8:29amSubstitution:

Rewrite each as:

6x=3y+18

6x=-12-3y

Since they are both 6x, then

3y+18=-12-3y

=>

6y=-30

y=-5

and

x=(3*(-5)+18)/6=1/2

By elimination (easier in this case)

Add the two equations:

6x-3y + 6x+3y = 18 -12

12x=6

x=1/2

-3y=18-6*(1/2)

y=-5

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