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w/4+2=12
We move all terms to the left:
w/4+2-(12)=0
We add all the numbers together, and all the variables
w/4-10=0
We multiply all the terms by the denominator
w-10*4=0
We add all the numbers together, and all the variables
w-40=0
We move all terms containing w to the left, all other terms to the right
w=40
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