-9=7w+2w

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Solution for -9=7w+2w equation: 



-9=7w+2w

We move all terms to the left:

-9-(7w+2w)=0

We add all the numbers together, and all the variables

-(+9w)-9=0

We get rid of parentheses

-9w-9=0

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

-9w=9

w=9/-9

w=-1

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