We have the following equation in x;
[tex]\begin{gathered} \frac{3}{18}=\frac{1}{x} \\ \end{gathered}[/tex]cross multiply to obtain;
[tex]3x=18[/tex]Then we divide both sides by 3 to obtain;
[tex]\begin{gathered} \frac{3x}{3}=\frac{18}{3} \\ x=6 \end{gathered}[/tex]Therefore, x = 6
