2e-9=21

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Solution for 2e-9=21 equation: 



2e-9=21

We move all terms to the left:

2e-9-(21)=0

We add all the numbers together, and all the variables

2e-30=0

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

2e=30

e=30/2

e=15

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