-20=7w-3w

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Solution for -20=7w-3w equation: 



-20=7w-3w

We move all terms to the left:

-20-(7w-3w)=0

We add all the numbers together, and all the variables

-(+4w)-20=0

We get rid of parentheses

-4w-20=0

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

-4w=20

w=20/-4

w=-5

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