1/3^(-x+7)=81

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Solution for 1/3^(-x+7)=81 equation: 



1/3^(-x+7)=81

We move all terms to the left:

1/3^(-x+7)-(81)=0



Domain of the equation: 3^(-x+7)!=0

x∈R



We add all the numbers together, and all the variables

1/3^(-1x+7)-81=0

We multiply all the terms by the denominator


-81*3^(-1x+7)+1=0

Wy multiply elements

-243x(-+1=0

We use the square of the difference formula

-243x(-1=0

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