7w-14w=-21

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Solution for 7w-14w=-21 equation: 



7w-14w=-21

We move all terms to the left:

7w-14w-(-21)=0

We add all the numbers together, and all the variables

-7w+21=0

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

-7w=-21

w=-21/-7

w=+3

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