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

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



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

We move all terms to the left:

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



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

-3(w+1)

We multiply parentheses

-3w-3

Back to the equation:

-(-3w-3)



We get rid of parentheses

3w+3w+3-21=0

We add all the numbers together, and all the variables

6w-18=0

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

6w=18

w=18/6

w=3

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