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July 31, 2014

July 31, 2014

Posted by **HELP me please asap!!** on Monday, January 24, 2011 at 12:45am.

*4y=15-3x

2y=3x+21

*4x=5y-14

y=-6x-9

*5x=4y-30

2x=3y=-12

*2/3y=10+4x

5x=1/3y-8

use linear combinations to solve the system of linear equations

thank you!!!

- math -
**Anonymous**, Monday, January 24, 2011 at 1:56am4y=15-3x

2y=3x+21

4y=15-3x Divide with 2

2y=(15/2)-(3/2)x

2y=(15/2)-(3/2)x=3x+21

(15/2)-21=3x+(3/2)x

(15/2)-(42/2)=(6/2)x(3/2)x

-(27/2)=(9/2)x Multiply with 2

-27=9x Divide with 9

x= -3

2y=3x+21

2y=3*(-3)+21

2y= -9+21

2y= 12 Divide with 2

y=6

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