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30=8w-3w
We move all terms to the left:
30-(8w-3w)=0
We add all the numbers together, and all the variables
-(+5w)+30=0
We get rid of parentheses
-5w+30=0
We move all terms containing w to the left, all other terms to the right
-5w=-30
w=-30/-5
w=+6
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