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4w-23=-7(w-3)
We move all terms to the left:
4w-23-(-7(w-3))=0
We calculate terms in parentheses: -(-7(w-3)), so:We get rid of parentheses
-7(w-3)
We multiply parentheses
-7w+21
Back to the equation:
-(-7w+21)
4w+7w-21-23=0
We add all the numbers together, and all the variables
11w-44=0
We move all terms containing w to the left, all other terms to the right
11w=44
w=44/11
w=4
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