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Evaluating Algebraic Expressions

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More Lessons for Grade 7 Math

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Videos, worksheets, solutions, and activities to help Algebra 1 or grade 7 students learn how to evaluate algebraic expressions.

We can evaluate an algebraic expression for different values of the variable.

To evaluate 3x + 1 for x = −2, we substitute −2 in place of x
3(−2) + 1 = −6 + 1 = −5

Remember to use order of operations to evaluate and be careful with the minus signs.

Basic Mathematics & Algebra : Substituting Values Into an Algebraic Expression
Substituting values into an algebraic expression in mathematics is easier to do if the numbers the values represent are given ahead of time.

Evaluating Algebraic Expressions

How to Evaluate Expressions with One Variable
How to Evaluate Expressions with Two Variables


Rotate to landscape screen format on a mobile phone or small tablet to use the Mathway widget, a free math problem solver that answers your questions with step-by-step explanations.

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

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