9=3(w-4)-21

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Solution for 9=3(w-4)-21 equation: 



9=3(w-4)-21

We move all terms to the left:

9-(3(w-4)-21)=0



We calculate terms in parentheses: -(3(w-4)-21), so:

3(w-4)-21

We multiply parentheses

3w-12-21

We add all the numbers together, and all the variables

3w-33

Back to the equation:

-(3w-33)



We get rid of parentheses

-3w+33+9=0

We add all the numbers together, and all the variables

-3w+42=0

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

-3w=-42

w=-42/-3

w=+14

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