Posted by **Dawn** on Friday, October 26, 2007 at 3:09pm.

Please help me solve:

y-x=5

2x-2y=10

&

5X+6y=14

-3y+x=7

- Substitution Method -
**bobpursley**, Friday, October 26, 2007 at 3:18pm
The first set cannot be solved, the two lines represented in the equations are parallel, and have no solution.

The second set, the second equation tells us that x= 3y+7, put that in the first equation

5(3y+7)+6y=14

15y+6y=14-35 solve for y

- Substitution Method -
**loren**, Saturday, July 10, 2010 at 9:17am
21y=-21 21y/21=-21/21 y=-1

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