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12=e/3
We move all terms to the left:
12-(e/3)=0
We add all the numbers together, and all the variables
-(+e/3)+12=0
We get rid of parentheses
-e/3+12=0
We multiply all the terms by the denominator
-e+12*3=0
We add all the numbers together, and all the variables
-1e+36=0
We move all terms containing e to the left, all other terms to the right
-e=-36
e=-36/-1
e=+36
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