Here, we want to solve for the value of n
What this simply mean is to isolate n on the lefthand side of the equation
We proceed as follows;
Divide both sides by 3
[tex]\begin{gathered} n\text{ + 1 = }\frac{5.4}{3} \\ \\ n\text{ + 1 = 1.8} \\ \\ n\text{ = 1.8-1} \\ \\ n\text{ = 0.8} \end{gathered}[/tex]