3(2e-1)=21

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Solution for 3(2e-1)=21 equation: 



3(2e-1)=21

We move all terms to the left:

3(2e-1)-(21)=0

We multiply parentheses

6e-3-21=0

We add all the numbers together, and all the variables

6e-24=0

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

6e=24

e=24/6

e=4

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