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w/6=-21
We move all terms to the left:
w/6-(-21)=0
We add all the numbers together, and all the variables
w/6+21=0
We multiply all the terms by the denominator
w+21*6=0
We add all the numbers together, and all the variables
w+126=0
We move all terms containing w to the left, all other terms to the right
w=-126
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