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7y-13=y-1
We move all terms to the left:
7y-13-(y-1)=0
We get rid of parentheses
7y-y+1-13=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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