7w+3w+2w-7w+3w=40

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Solution for 7w+3w+2w-7w+3w=40 equation: 



7w+3w+2w-7w+3w=40

We move all terms to the left:

7w+3w+2w-7w+3w-(40)=0

We add all the numbers together, and all the variables

8w-40=0

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

8w=40

w=40/8

w=5

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