SOLUTION: Can you help me solve the system? x+2y=-12 y=20-2x

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Question 227738: Can you help me solve the system?
x+2y=-12
y=20-2x
Answer by drj(1380) About Me  (Show Source):
You can put this solution on YOUR website!
Can you help me solve the system?

x+2y=-12
y=20-2x or 2x+y=20

Solved by pluggable solver: SOLVE linear system by SUBSTITUTION
Solve:
+system%28+%0D%0A++++1%5Cx+%2B+2%5Cy+=+-12%2C%0D%0A++++2%5Cx+%2B+1%5Cy+=+20+%29%0D%0A++We'll use substitution. After moving 2*y to the right, we get:
1%2Ax+=+-12+-+2%2Ay, or x+=+-12%2F1+-+2%2Ay%2F1. Substitute that
into another equation:
2%2A%28-12%2F1+-+2%2Ay%2F1%29+%2B+1%5Cy+=+20 and simplify: So, we know that y=-14.6666666666667. Since x+=+-12%2F1+-+2%2Ay%2F1, x=17.3333333333334.

Answer: system%28+x=17.3333333333334%2C+y=-14.6666666666667+%29.



I hope the above steps were helpful.

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Respectfully,
Dr J
http://www.FreedomUniversity.TV