SOLUTION: Solve using substitution: Y-x=4 3X+y=16

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Question 895002: Solve using substitution:
Y-x=4
3X+y=16
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
y-x=4
3x%2By=16
From the first equation,
y=x%2B4
Substitute into the second equation,
3x%2B%28x%2B4%29=16
4x%2B4=16
4x=12
x=3
Then,
y=3%2B4
y=7