21=3(w-2)-6w

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Solution for 21=3(w-2)-6w equation: 



21=3(w-2)-6w

We move all terms to the left:

21-(3(w-2)-6w)=0



We calculate terms in parentheses: -(3(w-2)-6w), so:

3(w-2)-6w

We add all the numbers together, and all the variables

-6w+3(w-2)

We multiply parentheses

-6w+3w-6

We add all the numbers together, and all the variables

-3w-6

Back to the equation:

-(-3w-6)



We get rid of parentheses

3w+6+21=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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