3^-x-4=5^-9x

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Solution for 3^-x-4=5^-9x equation: 



3^-x-4=5^-9x

We move all terms to the left:

3^-x-4-(5^-9x)=0

We add all the numbers together, and all the variables

-1x-(5^-9x)=0

We get rid of parentheses

-1x+9x-5^=0

We add all the numbers together, and all the variables

8x=0

x=0/8

x=0

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