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April 19, 2014

April 19, 2014

Posted by **mace** on Thursday, March 7, 2013 at 12:08pm.

8x+9y= -19

-3x+7y= -24

x=

y=

- math -
**Mary**, Thursday, March 7, 2013 at 12:18pmYou want to cancel one variable

Let's cancel the x's. 8 and 3 have a LCM, which is 24

3(8x + 9y= -19)= 24x + 27y= -57

8(-3x + 7y= -24)= -24x + 56y = -192

-------------------------------------

0 + 83y= -249

83y= -249

y= -3

Plug into the first equation to figure out what x is now.

8x + 9(-3)= -19

8x - 27= -19

8x= 8

x= 1

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