15w-21=18+2w

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Solution for 15w-21=18+2w equation: 



15w-21=18+2w

We move all terms to the left:

15w-21-(18+2w)=0

We add all the numbers together, and all the variables

15w-(2w+18)-21=0

We get rid of parentheses

15w-2w-18-21=0

We add all the numbers together, and all the variables

13w-39=0

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

13w=39

w=39/13

w=3

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