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e/2+4=12
We move all terms to the left:
e/2+4-(12)=0
We add all the numbers together, and all the variables
e/2-8=0
We multiply all the terms by the denominator
e-8*2=0
We add all the numbers together, and all the variables
e-16=0
We move all terms containing e to the left, all other terms to the right
e=16
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