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4w=2w+100
We move all terms to the left:
4w-(2w+100)=0
We get rid of parentheses
4w-2w-100=0
We add all the numbers together, and all the variables
2w-100=0
We move all terms containing w to the left, all other terms to the right
2w=100
w=100/2
w=50
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