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12+w/2=8
We move all terms to the left:
12+w/2-(8)=0
We add all the numbers together, and all the variables
w/2+4=0
We multiply all the terms by the denominator
w+4*2=0
We add all the numbers together, and all the variables
w+8=0
We move all terms containing w to the left, all other terms to the right
w=-8
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