12=9-3w

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Solution for 12=9-3w equation: 



12=9-3w

We move all terms to the left:

12-(9-3w)=0

We add all the numbers together, and all the variables

-(-3w+9)+12=0

We get rid of parentheses

3w-9+12=0

We add all the numbers together, and all the variables

3w+3=0

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

3w=-3

w=-3/3

w=-1

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