Question 35396
With this correction made, ln x - 4 ln 3 = ln(5/x)

ln x - 4 ln 3 = ln 5 - ln x


Add ln x  and 4 ln 3 to each side:
2 ln x = ln 5 + 4 ln 3

Divide by 2, and you should get
{{{ln x = (ln 5 + 4 ln 3)/ 2 }}}


Raise both sides as a power of e, and the answer should be 


{{{x = e^ ((ln 5 + 4 ln 3)/2)}}}


With a calculator, I get about 20.12, and this checks by graphing calculator methods of solving equations.


R^2 at SCC