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3w-23=-4(w-3)
We move all terms to the left:
3w-23-(-4(w-3))=0
We calculate terms in parentheses: -(-4(w-3)), so:We get rid of parentheses
-4(w-3)
We multiply parentheses
-4w+12
Back to the equation:
-(-4w+12)
3w+4w-12-23=0
We add all the numbers together, and all the variables
7w-35=0
We move all terms containing w to the left, all other terms to the right
7w=35
w=35/7
w=5
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