30-e-2e=9

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Solution for 30-e-2e=9 equation: 



30-e-2e=9

We move all terms to the left:

30-e-2e-(9)=0

We add all the numbers together, and all the variables

-3e+21=0

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

-3e=-21

e=-21/-3

e=+7

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