**Definition of Variable**

- Variables are (usually) letters or other symbols that represent unknown numbers or values.

**Examples of Variable **

- The following are examples of algebraic expressions and equations containing variables.

2*x*+ 5 = 10, the variable here is*x*

7*y*+ 10 = 24, the variable here is*y*

*a*^{2}+ b^{2}, the variables here are*a*and*b*

**Solved Example on Variable **

Identify the variables in the equation,

y = 3x+ 2.

Choices:

A. 2 andy

B.xandy

C.xand 3

D. 2 and 3

Correct Answer: B

Solution:

Step 1:Variables are letters or other symbols that represent unknown numbers or values.

Step 2:Therefore,xandyare the variables in the given equation

y= 3x+ 2.

**Related Terms for Variable **

- Algebraic Expression
- Equation
- Symbols