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99=8w+3
We move all terms to the left:
99-(8w+3)=0
We get rid of parentheses
-8w-3+99=0
We add all the numbers together, and all the variables
-8w+96=0
We move all terms containing w to the left, all other terms to the right
-8w=-96
w=-96/-8
w=+12
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