A letter in math can stand for any number
It is an expression
p= n=4
n will typically mean number. It can stand for any given number, and what it stands for will depend on the problem.
"Respective" means "in that order". So, for example, weights of 1 Newton, 2 N and 3 N at points p q and r respectively, menas a weight of 1 N at point p, 2 N at q and 3 N at r.
A letter in math can stand for any number
It means K C F or Keep Change Flip with fractions when multiplying E H I E A L P N P G E
The letters P N in this case stand for "prime numbers".
It is an expression
p= n=4
n will typically mean number. It can stand for any given number, and what it stands for will depend on the problem.
Five pennies in a nickel. (US coinage)
Seven players in a netball team.
United Nations Development Programme
Assuming that x represents multiplication, it is p times r times n or prn.
National Association for the Advancement of Colored People N A A C P
N plus 28 is a math equation. N would stand for an unknown number. You would add 28 to this unknown to find the answer.