solve the equation for x using the fact that if a^u =a^v then u=v. 9^-x+15=27x.

Question

thanks

Answer 1

You must have a typo
If you want me to use the stated property, then you must have meant

9^(-x+15) = 27^x

if as assumed, then

(3^2)^(-x+15) = (3^3)^x
3^(-2x + 30) = 3^3x

-2x + 30 = 3x , using your stated property
-5x = -30
x = 6

Answer 2

thanks