-12=-2(w+9)

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Solution for -12=-2(w+9) equation: 



-12=-2(w+9)

We move all terms to the left:

-12-(-2(w+9))=0



We calculate terms in parentheses: -(-2(w+9)), so:

-2(w+9)

We multiply parentheses

-2w-18

Back to the equation:

-(-2w-18)



We get rid of parentheses

2w+18-12=0

We add all the numbers together, and all the variables

2w+6=0

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

2w=-6

w=-6/2

w=-3

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