-21=-6w+3(w-8)

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Solution for -21=-6w+3(w-8) equation: 



-21=-6w+3(w-8)

We move all terms to the left:

-21-(-6w+3(w-8))=0



We calculate terms in parentheses: -(-6w+3(w-8)), so:

-6w+3(w-8)

We multiply parentheses

-6w+3w-24

We add all the numbers together, and all the variables

-3w-24

Back to the equation:

-(-3w-24)



We get rid of parentheses

3w+24-21=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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