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-3y+39=9(y-5)
We move all terms to the left:
-3y+39-(9(y-5))=0
We calculate terms in parentheses: -(9(y-5)), so:We get rid of parentheses
9(y-5)
We multiply parentheses
9y-45
Back to the equation:
-(9y-45)
-3y-9y+45+39=0
We add all the numbers together, and all the variables
-12y+84=0
We move all terms containing y to the left, all other terms to the right
-12y=-84
y=-84/-12
y=+7
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