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18.5w+6.5-2.8w=149.1
We move all terms to the left:
18.5w+6.5-2.8w-(149.1)=0
We add all the numbers together, and all the variables
15.7w-142.6=0
We move all terms containing w to the left, all other terms to the right
15.7w=142.6
w=142.6/15.7
w=9+1/12.0769230769
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