Question

log de 8 na base x igual a 3

Answer 1

$log_ab = x \\ a^x = b \\ \\ log_x8 = 3 \\ x^3 = 8 \\ 2^3 = 8 \\ x = 2$

Answer 2

log x(8)=3
x³=8
x³=2³

elimina os exponenciais e conserva as bases..

x=2