-9w+4=-7w

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Solution for -9w+4=-7w equation: 



-9w+4=-7w

We move all terms to the left:

-9w+4-(-7w)=0

We get rid of parentheses

-9w+7w+4=0

We add all the numbers together, and all the variables

-2w+4=0

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

-2w=-4

w=-4/-2

w=+2

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