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Evaluating expressions with two variables Evaluating expressions with two variables: fractions & decimals Practice Evaluating expressions with multiple variables Get 3 of 4 questions to level up!

In algebra, we use variables like x, y, and z to represent unknown values. Expressions are combinations of variables and numbers, while equations equate two expressions. Variables can take on different …

A variable is a symbol that represents a value, often one that changes, like how long you've been awake. Learn ways that we can change an expression's value (such as by changing the values of its …

Learn about dependent and independent variables through an exercise example, including their identification and relationship in algebraic contexts.

Learn algebra—variables, equations, functions, graphs, and more.

Practice figuring out if a variable is dependent or independent.

Learn algebra online with Khan Academy, covering equations and inequalities through engaging lessons and exercises to enhance your understanding.

The core idea in algebra is using letters to represent relationships between numbers without specifying what those numbers are! Let's explore the basics of communicating in algebraic expressions.

Learn how to solve the equation 2x + 3 = 5x - 2 with the variable on both sides. We start by visualizing the equation, then isolate the variable by performing the same operations on both sides. Finally, we …