Answer:
a) [tex]x=\frac{15}{p}[/tex]
b) x=[tex]-3[/tex]
Step-by-step explanation:
First, you distribute the 4 to open the parentheses.
[tex]4px+4=64[/tex]
Subtract 4 to both sides:
[tex]4px=60[/tex]
Divide by 4p on both sides:
[tex]x=\frac{60}{4p}[/tex]
[tex]x=\frac{15}{p}[/tex]
For the second part, substitute the value of p.
[tex]x=\frac{15}{-5}[/tex]
[tex]x=-3[/tex]
