4e+1=21

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Solution for 4e+1=21 equation: 



4e+1=21

We move all terms to the left:

4e+1-(21)=0

We add all the numbers together, and all the variables

4e-20=0

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

4e=20

e=20/4

e=5

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