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July 31, 2014

July 31, 2014

Posted by **pam** on Friday, February 4, 2011 at 7:38pm.

3x-4y=22

2x+5y=7

- math -
**helper**, Friday, February 4, 2011 at 7:59pm3x - 4y = 22

2x + 5y = 7

To eliminate variable x,

Multiply by -2 (3x - 4y = 22)

Multiply by 3 (2x + 5y = 7)

Add equations

-6x + 8y = -44

6x + 15y = 21

0 + 23y = -23

23y = -23

y = -1

To find x,

substitute y = -1, in 2x + 5y = 7

2x + 5y = 7

2x - 5 = 7

2x = 12

x = 6

x = 6, y = -1

- math -
**donneisha**, Friday, February 4, 2011 at 10:47pmx=6

- math -
**rose**, Sunday, April 1, 2012 at 3:46pm3x+4y=-22

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