12=7w-4w

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Solution for 12=7w-4w equation: 



12=7w-4w

We move all terms to the left:

12-(7w-4w)=0

We add all the numbers together, and all the variables

-(+3w)+12=0

We get rid of parentheses

-3w+12=0

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

-3w=-12

w=-12/-3

w=+4

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