20=20-3e-9

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Solution for 20=20-3e-9 equation: 



20=20-3e-9

We move all terms to the left:

20-(20-3e-9)=0

We add all the numbers together, and all the variables

-(-3e+11)+20=0

We get rid of parentheses

3e-11+20=0

We add all the numbers together, and all the variables

3e+9=0

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

3e=-9

e=-9/3

e=-3

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