1=21-5w

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Solution for 1=21-5w equation: 



1=21-5w

We move all terms to the left:

1-(21-5w)=0

We add all the numbers together, and all the variables

-(-5w+21)+1=0

We get rid of parentheses

5w-21+1=0

We add all the numbers together, and all the variables

5w-20=0

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

5w=20

w=20/5

w=4

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