12w+w-9w+w=20

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Solution for 12w+w-9w+w=20 equation: 



12w+w-9w+w=20

We move all terms to the left:

12w+w-9w+w-(20)=0

We add all the numbers together, and all the variables

5w-20=0

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

5w=20

w=20/5

w=4

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