4e-3=e+21

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Solution for 4e-3=e+21 equation: 



4e-3=e+21

We move all terms to the left:

4e-3-(e+21)=0

We get rid of parentheses

4e-e-21-3=0

We add all the numbers together, and all the variables

3e-24=0

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

3e=24

e=24/3

e=8

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