log(13x)=6.58

log(13x)=6.58   x=?

$$\small{\text{ $ \begin{array}{rcll} \log_{10}(13x) &=& 6.58 & | \quad 10^{()} \\\\ 13x &=& 10^{6.58} & | \quad :13 \\\\ x &=& \frac{10^{6.58}}{13}\\\\ x &=& 292453.381785 \end{array} $ }}$$