3 log base 4 x + log base x 16 = 11/2

First I know I have to use change of base rule

3 log base 4 x will be log x^3/log 4 =3 log x/2 log 2

Log base x 16 will be equal to log 16/log x = 2/log x

But this method is'nt working. How do I manipulate this log equation?

Critism is welcome.