-21=4w+3w

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Solution for -21=4w+3w equation: 



-21=4w+3w

We move all terms to the left:

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

We add all the numbers together, and all the variables

-(+7w)-21=0

We get rid of parentheses

-7w-21=0

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

-7w=21

w=21/-7

w=-3

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