SOLUTION: what is the answer to y=3x+3 3x+2y=-12 I tried to figure it out and got an answer can you tell me if its right

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Question 38317: what is the answer to y=3x+3
3x+2y=-12
I tried to figure it out and got an answer can you tell me if its right
Answer by Earlsdon(6103) About Me  (Show Source):
You can put this solution on YOUR website!
Solve the system of equations:
y+=+3x%2B3 Substitute this for y in the second equation and solve for x.
3x%2B2y+=+-12
3x%2B2%283x%2B3%29+=+-12 Solve for x.
3x%2B6x%2B6+=+-12 Simplify.
9x%2B6+=+-12 Subtract 6 from both sides.
9x+=+-18 Divide both sides by 9.
x+=+-2 Substitute this for x in the first equation and solve for y.
y+=+3x%2B3
y+=+3%28-2%29%2B3
y+=+-3
Solution:
(-2, -3)