$9-8p+4=41$
Add the numbers$13-8p=41$
Move the constant to the right-hand side and change its sign$-8p=41-13$
Subtract the numbers$-8p=28$
Divide both sides of the equation by $-8$$\begin{align*}&p=-\frac{ 7 }{ 2 } \\&\begin{array} { l }p=-3 \frac{ 1 }{ 2 },& p=-3.5\end{array}\end{align*}$