3w+21-5w=15

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Solution for 3w+21-5w=15 equation: 



3w+21-5w=15

We move all terms to the left:

3w+21-5w-(15)=0

We add all the numbers together, and all the variables

-2w+6=0

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

-2w=-6

w=-6/-2

w=+3

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