8w-15w=-21

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Solution for 8w-15w=-21 equation: 



8w-15w=-21

We move all terms to the left:

8w-15w-(-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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