г) 5√9x − 5 = -2 ;

г) $$5√9x − 5 = -2$$.

$$5\sqrt[5]{9x - 5} = -2 \implies \sqrt[5]{9x - 5} = - \frac{2}{5} \implies 9x - 5 = - \frac{32}{3125} \implies 9x = 5 - \frac{32}{3125} \implies x = \frac{1}{9}(5 - \frac{32}{3125}) \implies x = \frac{15625 - 32}{28125} = \frac{15593}{28125}$$.

Ответ: $$\frac{15593}{28125}$$