SOLUTION: how can i solve this equation using substitution method? x+y=12 y=x+3

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Question 1068314: how can i solve this equation using substitution method?
x+y=12
y=x+3
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Substitute the second equation into the first,
x%2B%28x%2B3%29=12
2x%2B3=12
Now solve for x.
THen go back and solve for y with either equation.