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9y-18=2(y-2)
We move all terms to the left:
9y-18-(2(y-2))=0
We calculate terms in parentheses: -(2(y-2)), so:We get rid of parentheses
2(y-2)
We multiply parentheses
2y-4
Back to the equation:
-(2y-4)
9y-2y+4-18=0
We add all the numbers together, and all the variables
7y-14=0
We move all terms containing y to the left, all other terms to the right
7y=14
y=14/7
y=2
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