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2(2w+w)=300
We move all terms to the left:
2(2w+w)-(300)=0
We add all the numbers together, and all the variables
2(+3w)-300=0
We multiply parentheses
6w-300=0
We move all terms containing w to the left, all other terms to the right
6w=300
w=300/6
w=50
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