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18=-7w+2(w-6)
We move all terms to the left:
18-(-7w+2(w-6))=0
We calculate terms in parentheses: -(-7w+2(w-6)), so:We get rid of parentheses
-7w+2(w-6)
We multiply parentheses
-7w+2w-12
We add all the numbers together, and all the variables
-5w-12
Back to the equation:
-(-5w-12)
5w+12+18=0
We add all the numbers together, and all the variables
5w+30=0
We move all terms containing w to the left, all other terms to the right
5w=-30
w=-30/5
w=-6
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