Answer:
p = 0
Explanation:
The given equality is p= -2p - 15p 
Simplifying, p = (-2-15)p 
=> p= -17p 
Moving all the terms to the left hand side: 
=> p + 17 p =0 
=> 18 p =0 
The only value of p for which this equality will hold is when p= 0/18 = 0 
Validation:
Substituting p = 0 in the original equality: 
p= -2p - 15p 
LHS = p = 0 
RHS = -2p - 15p 
= -2*0 -15*0 = 0-0 = 0 
So the two sides are equal and the equality is valid for p = 0.