4e-3=21

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Solution for 4e-3=21 equation: 



4e-3=21

We move all terms to the left:

4e-3-(21)=0

We add all the numbers together, and all the variables

4e-24=0

We move all terms containing e to the left, all other terms to the right

4e=24

e=24/4

e=6

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