9e=3e+21

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Solution for 9e=3e+21 equation: 



9e=3e+21

We move all terms to the left:

9e-(3e+21)=0

We get rid of parentheses

9e-3e-21=0

We add all the numbers together, and all the variables

6e-21=0

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

6e=21

e=21/6

e=3+1/2

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