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-13=-4w+7(w+2)
We move all terms to the left:
-13-(-4w+7(w+2))=0
We calculate terms in parentheses: -(-4w+7(w+2)), so:We get rid of parentheses
-4w+7(w+2)
We multiply parentheses
-4w+7w+14
We add all the numbers together, and all the variables
3w+14
Back to the equation:
-(3w+14)
-3w-14-13=0
We add all the numbers together, and all the variables
-3w-27=0
We move all terms containing w to the left, all other terms to the right
-3w=27
w=27/-3
w=-9
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