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-28+7e=3e+14
We move all terms to the left:
-28+7e-(3e+14)=0
We get rid of parentheses
7e-3e-14-28=0
We add all the numbers together, and all the variables
4e-42=0
We move all terms containing e to the left, all other terms to the right
4e=42
e=42/4
e=10+1/2
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