# Algebra Definition

**Algebra **is a **branch of mathematics** in which **alphabetic letters (a - z) symbolize the value or an expression of a number**. The **symbols used in algebra** **represent the number without any fixed value**, also known as a **variable**.

Moreover, When an equivalent sign (=) is used with those variables, those expressions became an equation.

**Note:**

To know about abacus, you can use our Abacus Definition.

For better understanding, let us have a very simple example.

Suppose an equation using a variable: 5 + 6 = x. In this case, x = 11, or it can also be written as "x equals to five." It is called solving an algebraic equation for x.