SOLUTION: y=2x x+y=12 How do I solve the system of equation using the substitution method?

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Question 20165: y=2x
x+y=12
How do I solve the system of equation using the substitution method?
Answer by elima(1433) About Me  (Show Source):
You can put this solution on YOUR website!
y=2x
x+y=12
We are already given what y =, so use that in the other equation to find the answer for x;
x+ 2x=12
3x=12
x=4
Now plug that into the first equation to find y;
y=2(4)
y=8
Hope you understand!
=)