21=w/4+9

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Solution for 21=w/4+9 equation: 



21=w/4+9

We move all terms to the left:

21-(w/4+9)=0

We get rid of parentheses

-w/4-9+21=0

We multiply all the terms by the denominator


-w-9*4+21*4=0

We add all the numbers together, and all the variables

-1w+48=0

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

-w=-48

w=-48/-1

w=+48

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