7^-x+2=40

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Solution for 7^-x+2=40 equation: 



7^-x+2=40

We move all terms to the left:

7^-x+2-(40)=0

determiningTheFunctionDomain
-x+2-40+7^=0

We add all the numbers together, and all the variables

-x=0

x=0/-1

x=0

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