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7y-7=13y+5
We move all terms to the left:
7y-7-(13y+5)=0
We get rid of parentheses
7y-13y-5-7=0
We add all the numbers together, and all the variables
-6y-12=0
We move all terms containing y to the left, all other terms to the right
-6y=12
y=12/-6
y=-2
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