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9w-12=5(w+4)
We move all terms to the left:
9w-12-(5(w+4))=0
We calculate terms in parentheses: -(5(w+4)), so:We get rid of parentheses
5(w+4)
We multiply parentheses
5w+20
Back to the equation:
-(5w+20)
9w-5w-20-12=0
We add all the numbers together, and all the variables
4w-32=0
We move all terms containing w to the left, all other terms to the right
4w=32
w=32/4
w=8
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