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-8w+40=-2(w-2)

We move all terms to the left:

-8w+40-(-2(w-2))=0

We calculate terms in parentheses: -(-2(w-2)), so:We get rid of parentheses

-2(w-2)

We multiply parentheses

-2w+4

Back to the equation:

-(-2w+4)

-8w+2w-4+40=0

We add all the numbers together, and all the variables

-6w+36=0

We move all terms containing w to the left, all other terms to the right

-6w=-36

w=-36/-6

w=+6

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