3w+9w=84

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Solution for 3w+9w=84 equation: 



3w+9w=84

We move all terms to the left:

3w+9w-(84)=0

We add all the numbers together, and all the variables

12w-84=0

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

12w=84

w=84/12

w=7

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