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X is the symbol for multiplication, as in 2X2=4 X (or any other letter) is often used to represent an unknown quantity.
An unknown number represented by a letter or symbol is a variable.
It is called a variable.
variable
VARIABLE. When this variable has a fixed number assigned to it and does not change, it is called a "fixed variable".
In maths the symbols x and n are usually used to represent an unknown quantity. These may be referred to as a variable.
b
X is the symbol for multiplication, as in 2X2=4 X (or any other letter) is often used to represent an unknown quantity.
x or any other variable
mnemonic * * * * * A variable
x
It is a variable and is expressed as a letter as for example it could be x or y
Variable
A variable
Variable
It is called a variable.
An unknown number represented by a letter or symbol is a variable.