**In this module you can learn what a variables and expressions are and how they are used in algebra.**

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There are no rules that determine what letter is used as a variable.

Variables always represent some value, even if that value is zero.

The number that comes just after "x" is not "y"; it is "x + 1".

**Study and practice**

- Read about variablesThis page from purplemath explains what a variable actually is.

Use these search terms to find your own resources:

*what is a variable**algebra variablesworking with variables*