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w/2+6=18
We move all terms to the left:
w/2+6-(18)=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
w-24=0
We move all terms containing w to the left, all other terms to the right
w=24
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