31=4-9w

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Solution for 31=4-9w equation: 



31=4-9w

We move all terms to the left:

31-(4-9w)=0

We add all the numbers together, and all the variables

-(-9w+4)+31=0

We get rid of parentheses

9w-4+31=0

We add all the numbers together, and all the variables

9w+27=0

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

9w=-27

w=-27/9

w=-3

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