# Are You Ready to Evaluate Algebraic Expressions?

In the past, you've evaluated numerical expressions by using the order of operations. We are going to use these same rules to evaluate **algebraic expressions**.

## What is an Algebraic Expression?

An Algebraic expression is an expression that you will see most often once you start Algebra. In Algebra we work with **variables** and numerals. A **variable** is a symbol, usually a letter, that represents one or more numbers.

Thus, an algebraic expression consists of numbers, variables, and operations.

## Examples of Algebraic Expressions

An algebraic expression consists of numbers, variables, and operations. Here are a few examples:

In order to evaluate an algebraic expression, you must know the exact values for each variable. Then you will simply substitute and evaluate using the order of operations. Take a look at example 1.

## Example 1 - Evaluating Algebraic Expressions

Now, lets evaluate algebraic expressions with more than one variable. Don't forget to always use the order of operations when evaluating the expression after substituting.

## Example 2 - Expressions with More Than One Variable

And... one last example where we will look at the fraction bar as a grouping symbol and evaluating the expression when you have more than one of the same variable.

## Example 3 - Using the Fraction Bar as a Grouping Symbol

If you are familiar with the order of operations, then evaluating algebraic expressions is quite easy! Just remember to substitute the given values for each variable and evaluate.

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