18=9+-3w

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Solution for 18=9+-3w equation: 



18=9+-3w

We move all terms to the left:

18-(9+-3w)=0

We add all the numbers together, and all the variables

-(-3w)+18=0

We get rid of parentheses

3w+18=0

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

3w=-18

w=-18/3

w=-6

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