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4=20w-2
We move all terms to the left:
4-(20w-2)=0
We get rid of parentheses
-20w+2+4=0
We add all the numbers together, and all the variables
-20w+6=0
We move all terms containing w to the left, all other terms to the right
-20w=-6
w=-6/-20
w=3/10
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