Respuesta :

Answer:

  [tex]\boxed{18}[/tex]

Step-by-step explanation:

One of the rules of logarithms is ...

  log(a^b) = b·log(a)

So ...

[tex]6\log_5{x^3}=6(3\log_5{x})=\bf{18}\log_5{x}[/tex]