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157=-y+260
We move all terms to the left:
157-(-y+260)=0
We add all the numbers together, and all the variables
-(-1y+260)+157=0
We get rid of parentheses
1y-260+157=0
We add all the numbers together, and all the variables
y-103=0
We move all terms containing y to the left, all other terms to the right
y=103
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