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

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Question 122768: Solve the system by substitution.
x + y = 12
y = 2x
Answer by checkley71(8403) About Me  (Show Source):
You can put this solution on YOUR website!
Y=2X
X+2X=12
3X=12
X=12/3
X=4 ANSWER.
Y=2*4=8 ANSWER.