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6w-18=3(w-7)
We move all terms to the left:
6w-18-(3(w-7))=0
We calculate terms in parentheses: -(3(w-7)), so:We get rid of parentheses
3(w-7)
We multiply parentheses
3w-21
Back to the equation:
-(3w-21)
6w-3w+21-18=0
We add all the numbers together, and all the variables
3w+3=0
We move all terms containing w to the left, all other terms to the right
3w=-3
w=-3/3
w=-1
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