Answer:
[tex]\begin{gathered} x=\frac{15}{p} \\ x=-3 \end{gathered}[/tex]Step-by-step explanation:
To solve the equation use inverse operations. Addition and subtraction are inverse operations, multiplication, and division too.
Therefore, solve for x in the expression below:
[tex]\begin{gathered} 4(px+1)=64 \\ px+1=\frac{64}{4} \\ px+1=16 \\ px=16-1 \\ px=15 \\ x=\frac{15}{p} \end{gathered}[/tex]Now, substitute p=-5 into the equation we got above:
[tex]\begin{gathered} x=\frac{15}{-5} \\ x=-3 \end{gathered}[/tex]