In Latin there were letters instead of our kind of numbers:
I = 1
V =5
X = 10
L = 50
C = 100
and so on.
Yes, it can be.
A variable
A variable.
a variable
The unknown or the variable
They are variables or unknowns and are used in algebra.
Yes, it is.
The gender of the pronoun 'it' is neuter, a word that takes the place of a noun for a thing that has no gender.The number of the pronoun 'it' is singular, a word that takes the place of a noun for one thing.
T in the metric unit of weight is ton.
variable
variable
When you do not know the value of a particular number, the most usual symbol used in place of that number is the letter x.