20=4-2e

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Solution for 20=4-2e equation: 



20=4-2e

We move all terms to the left:

20-(4-2e)=0

We add all the numbers together, and all the variables

-(-2e+4)+20=0

We get rid of parentheses

2e-4+20=0

We add all the numbers together, and all the variables

2e+16=0

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

2e=-16

e=-16/2

e=-8

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