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-55=8w-7
We move all terms to the left:
-55-(8w-7)=0
We get rid of parentheses
-8w+7-55=0
We add all the numbers together, and all the variables
-8w-48=0
We move all terms containing w to the left, all other terms to the right
-8w=48
w=48/-8
w=-6
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