7-3e=-20

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Solution for 7-3e=-20 equation: 



7-3e=-20

We move all terms to the left:

7-3e-(-20)=0

We add all the numbers together, and all the variables

-3e+27=0

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

-3e=-27

e=-27/-3

e=+9

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