45=12w-7w

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Solution for 45=12w-7w equation: 



45=12w-7w

We move all terms to the left:

45-(12w-7w)=0

We add all the numbers together, and all the variables

-(+5w)+45=0

We get rid of parentheses

-5w+45=0

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

-5w=-45

w=-45/-5

w=+9

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