Isolate the variable term by subtracting 6 from both sides of the equation.
[tex]\begin{gathered} 3n=15-6 \\ 3n=9 \end{gathered}[/tex]Divide both sides of the equation by 3.
[tex]\begin{gathered} \frac{3n}{3}=\frac{9}{3} \\ n=3 \end{gathered}[/tex]Therefore, the value of n is 3.
