21=31-3(-3-1w)

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Solution for 21=31-3(-3-1w) equation: 



21=31-3(-3-1w)

We move all terms to the left:

21-(31-3(-3-1w))=0

We add all the numbers together, and all the variables

-(31-3(-1w-3))+21=0



We calculate terms in parentheses: -(31-3(-1w-3)), so:

31-3(-1w-3)

determiningTheFunctionDomain
-3(-1w-3)+31

We multiply parentheses

3w+9+31

We add all the numbers together, and all the variables

3w+40

Back to the equation:

-(3w+40)



We get rid of parentheses

-3w-40+21=0

We add all the numbers together, and all the variables

-3w-19=0

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

-3w=19

w=19/-3

w=-6+1/3

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