-21=-4w+7(w-6)

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Solution for -21=-4w+7(w-6) equation: 



-21=-4w+7(w-6)

We move all terms to the left:

-21-(-4w+7(w-6))=0



We calculate terms in parentheses: -(-4w+7(w-6)), so:

-4w+7(w-6)

We multiply parentheses

-4w+7w-42

We add all the numbers together, and all the variables

3w-42

Back to the equation:

-(3w-42)



We get rid of parentheses

-3w+42-21=0

We add all the numbers together, and all the variables

-3w+21=0

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

-3w=-21

w=-21/-3

w=+7

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