2^-x=0.8

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Solution for 2^-x=0.8 equation: 



2^-x=0.8

We move all terms to the left:

2^-x-(0.8)=0

We add all the numbers together, and all the variables

-1x+0.57434917749852=0

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

-x=-0.57434917749852

x=-0.57434917749852/-1

x=0.57434917749852/1

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