"vary" means to take on a different values , to change in value -- pretty much the everyday meaning.
It means: 3 times n
x-n = 1 / xn
I assume that with n(...) you mean the size of the set. It sure can; but it need not be.
n will typically mean number. It can stand for any given number, and what it stands for will depend on the problem.
The equation N-6=2 is a math problem. The answer to this math problem would be N=4.
Nine
negative nine
number numeral nought
That's a u
It means: 3 times n
If this is math it is probably refering to "n" as a specified number in a key/legend
x-n = 1 / xn
I assume that with n(...) you mean the size of the set. It sure can; but it need not be.
join
The N word is a form of the word Negro that is widely viewed as racist and offensive.
n will typically mean number. It can stand for any given number, and what it stands for will depend on the problem.
"More than" is a keyword for addition. The answer to "26 more than "n"" means: 26 + n.