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3y-9=3(3y-1)
We move all terms to the left:
3y-9-(3(3y-1))=0
We calculate terms in parentheses: -(3(3y-1)), so:We get rid of parentheses
3(3y-1)
We multiply parentheses
9y-3
Back to the equation:
-(9y-3)
3y-9y+3-9=0
We add all the numbers together, and all the variables
-6y-6=0
We move all terms containing y to the left, all other terms to the right
-6y=6
y=6/-6
y=-1
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