21=5w-9

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Solution for 21=5w-9 equation: 



21=5w-9

We move all terms to the left:

21-(5w-9)=0

We get rid of parentheses

-5w+9+21=0

We add all the numbers together, and all the variables

-5w+30=0

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

-5w=-30

w=-30/-5

w=+6

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