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13=-5w+8(w+2)
We move all terms to the left:
13-(-5w+8(w+2))=0
We calculate terms in parentheses: -(-5w+8(w+2)), so:We get rid of parentheses
-5w+8(w+2)
We multiply parentheses
-5w+8w+16
We add all the numbers together, and all the variables
3w+16
Back to the equation:
-(3w+16)
-3w-16+13=0
We add all the numbers together, and all the variables
-3w-3=0
We move all terms containing w to the left, all other terms to the right
-3w=3
w=3/-3
w=-1
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