21=5+4w

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Solution for 21=5+4w equation: 



21=5+4w

We move all terms to the left:

21-(5+4w)=0

We add all the numbers together, and all the variables

-(4w+5)+21=0

We get rid of parentheses

-4w-5+21=0

We add all the numbers together, and all the variables

-4w+16=0

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

-4w=-16

w=-16/-4

w=+4

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