100-30*e=80

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Solution for 100-30*e=80 equation: 



100-30e=80

We move all terms to the left:

100-30e-(80)=0

We add all the numbers together, and all the variables

-30e+20=0

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

-30e=-20

e=-20/-30

e=2/3

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