So in order to do this problem, we want to get y by itself. So right now, the y has x being added to it. In order to "undo" the addition, we need to subtract something from both sides that leaves us with just y on the left.
So we do:
y=-x+15 OR y=15-x
The answers are the same, just two ways to write them.
Please let me know if you have any questions! :)
Apr 26th, 2015
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