Step 1: Write out the equation
[tex]3n+6=15[/tex]Step 2: Subtract 6 from both sides of the equation t
[tex]\begin{gathered} 3n+6-6=15-6 \\ 3n=9 \end{gathered}[/tex]Step 3: Divide both sides of the equation by 3
[tex]\begin{gathered} \frac{3n}{3}=\frac{9}{3} \\ n=3 \end{gathered}[/tex]