7w-4w=21

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Solution for 7w-4w=21 equation: 



7w-4w=21

We move all terms to the left:

7w-4w-(21)=0

We add all the numbers together, and all the variables

3w-21=0

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

3w=21

w=21/3

w=7

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