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8-w/2=20
We move all terms to the left:
8-w/2-(20)=0
We add all the numbers together, and all the variables
-w/2-12=0
We multiply all the terms by the denominator
-w-12*2=0
We add all the numbers together, and all the variables
-1w-24=0
We move all terms containing w to the left, all other terms to the right
-w=24
w=24/-1
w=-24
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