15w-8w=21

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Solution for 15w-8w=21 equation: 



15w-8w=21

We move all terms to the left:

15w-8w-(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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