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5e-4=3e+8
We move all terms to the left:
5e-4-(3e+8)=0
We get rid of parentheses
5e-3e-8-4=0
We add all the numbers together, and all the variables
2e-12=0
We move all terms containing e to the left, all other terms to the right
2e=12
e=12/2
e=6
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