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12(7-y)=8(y-1)
We move all terms to the left:
12(7-y)-(8(y-1))=0
We add all the numbers together, and all the variables
12(-1y+7)-(8(y-1))=0
We multiply parentheses
-12y-(8(y-1))+84=0
We calculate terms in parentheses: -(8(y-1)), so:We get rid of parentheses
8(y-1)
We multiply parentheses
8y-8
Back to the equation:
-(8y-8)
-12y-8y+8+84=0
We add all the numbers together, and all the variables
-20y+92=0
We move all terms containing y to the left, all other terms to the right
-20y=-92
y=-92/-20
y=4+3/5
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