3^-9x=3^12x+4

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Solution for 3^-9x=3^12x+4 equation: 



3^-9x=3^12x+4

We move all terms to the left:

3^-9x-(3^12x+4)=0

We add all the numbers together, and all the variables

-9x-(3^12x+4)=0

We get rid of parentheses

-9x-3^12x-4=0

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

-9x-3^12x=4

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