Question

Помогите ))))))
(9/4)^-x=8/27

Answer 1

$left( frac{9}{4} right)^{-x}= frac{8}{27} \\left( frac{4}{9} right)^{x}= frac{2^3}{3^3} \\ left( frac{2}{3} right)^{2x}= left(frac{2}{3}right)^3$

$2x=3 \ \ x= frac{3}{2}=1.5$