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-20=4-8w
We move all terms to the left:
-20-(4-8w)=0
We add all the numbers together, and all the variables
-(-8w+4)-20=0
We get rid of parentheses
8w-4-20=0
We add all the numbers together, and all the variables
8w-24=0
We move all terms containing w to the left, all other terms to the right
8w=24
w=24/8
w=3
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