Posted by **electra** on Thursday, December 13, 2007 at 6:36pm.

USE LINEAR COMBINATIONS TO SOLVE THE SYSTEM OF LINEAR EQUATIONS (please show steps)

1) -X+8Y=16 2) 4X+5Y=-2 3)4Y=15-3X

3X+4Y=36 5X-4Y=-23 2Y=3X+21

- Algebra HELP -
**bobpursley**, Thursday, December 13, 2007 at 7:50pm
I will do one. Then, I will happily critique your thinking on others. Take the third.

4y=15-3x

2y=3x+21

double the second one..

4y=15-3x

4y=6x+42

subtract, then the result is ..

0=9x-45 and solve for x.

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