1.8 Lösning 4d

\[\begin{align} \ln\,2\,x & = \ln\,10 - \ln\,5 \quad & &: \;\text{Logaritmlag 2}\\ \ln\,2\,x & = \ln\,\left({10 \over 5}\right) \\ \ln\,2\,x & = \ln\,2 \\ 2\,x & = 2 \\ x & = 1 \end{align}\]