21=6w+w

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Solution for 21=6w+w equation: 



21=6w+w

We move all terms to the left:

21-(6w+w)=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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