An algebraic expression uses a letter to represent an unknown quantity.
[object Object]
In mathematical expressions, a variable (a letter used to represent a certain value) represents an unknown or changeable value. It is often the variable x.
An unknown variable
b
a variable.
an unknown quantity represented by a letter
Unknonwn quantity is any variable a,b,c or x,y
In mathematical expressions, a variable (a letter used to represent a certain value) represents an unknown or changeable value. It is often the variable x.
x= the unknown
X is the symbol for multiplication, as in 2X2=4 X (or any other letter) is often used to represent an unknown quantity.
A variable.
An unknown variable
b
VARIABLE
mnemonic * * * * * A variable
a variable.
X and y
A variable is usually used for that - for example, a single letter that represents the unknown quantity.