SOLUTION: Solve the system by substitution. x + y = 12 y = 2x

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Question 105382: Solve the system by substitution.
x + y = 12
y = 2x
Answer by HyperBrain(694) About Me  (Show Source):
You can put this solution on YOUR website!
Since x%2By=12 and y=2x,
then,,,
x%2B2x=12
3x=12
x=4

Solving for y,
y=2x
y=2%2A4
y=8

Thus, x=4 and y=8

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