SOLUTION: how do i y=2x and x+y=12 by solving system of equations by the substitution method?

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Question 580926: how do i y=2x and x+y=12 by solving system of equations by the substitution method?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
y=2x and x+y=12
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Substitute for "y" and solve for "x":
x+(2x) = 12
3x = 12
x = 4
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Solve for "y":
y = 2x
y = 2*4
y = 8
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Cheers,
Stan H.
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