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24=-8w+3(w-7)
We move all terms to the left:
24-(-8w+3(w-7))=0
We calculate terms in parentheses: -(-8w+3(w-7)), so:We get rid of parentheses
-8w+3(w-7)
We multiply parentheses
-8w+3w-21
We add all the numbers together, and all the variables
-5w-21
Back to the equation:
-(-5w-21)
5w+21+24=0
We add all the numbers together, and all the variables
5w+45=0
We move all terms containing w to the left, all other terms to the right
5w=-45
w=-45/5
w=-9
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