9w-12=-21

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Solution for 9w-12=-21 equation: 



9w-12=-21

We move all terms to the left:

9w-12-(-21)=0

We add all the numbers together, and all the variables

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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