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(10+13)+(2+7y)=0
We add all the numbers together, and all the variables
(7y+2)+23=0
We get rid of parentheses
7y+2+23=0
We add all the numbers together, and all the variables
7y+25=0
We move all terms containing y to the left, all other terms to the right
7y=-25
y=-25/7
y=-3+4/7
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