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8e+3=4e+39
We move all terms to the left:
8e+3-(4e+39)=0
We get rid of parentheses
8e-4e-39+3=0
We add all the numbers together, and all the variables
4e-36=0
We move all terms containing e to the left, all other terms to the right
4e=36
e=36/4
e=9
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