21=w-17

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Solution for 21=w-17 equation: 



21=w-17

We move all terms to the left:

21-(w-17)=0

We get rid of parentheses

-w+17+21=0

We add all the numbers together, and all the variables

-1w+38=0

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

-w=-38

w=-38/-1

w=+38

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