SOLUTION: how do i solve x=-11y; 15y-21=-2x using substitution?

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Question 177056: how do i solve x=-11y; 15y-21=-2x using substitution?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
1.x=-11y
2.15y-21=-2x
Directly substitute eq. 1 into eq. 2 and solve for y.
2.15y-21=-2x
15y-21=-2%28-11y%29
15y-21=22y
-7y-21=0
-7y=21
highlight%28y=-3%29
Then from eq. 1,
1.x=-11y
x=-11%28-3%29
highlight%28x=33%29