Question

lg 3 x- lg 9 x+ lg 81 x = 3/4

Answer 1

$lg3x-lg9x+lg81x=3/4$
$lg((3x/9x)*81x)=3/4$
$lg27x=3/4$
$10^{3/4}=27x$
$x=10^{3/4}/27$