Variables in math are symbols, often letters, that represent different values in various situations. They help us understand and solve problems with changing values.

Practice Writing basic expressions with variables Get 5 of 7 questions to level up!

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The Algebra 1 course, often taught in the 9th grade, covers Linear equations, inequalities, functions, and graphs; Systems of equations and inequalities; Extension of the concept of a …

The perimeter of a rectangle is equal to 2 times the length plus 2 times the width. We can solve for the length by isolating it on one side of the equation. We do this by subtracting 2 times the …

The number of questions you get right is the independent variable, and that's driving the number of points you score. So the number of points you score is the dependent variable.

Learn variables, expressions, and equations with interactive lessons and videos on Khan Academy.

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 …

Knowing independent and dependent variables is valuable in this manner; it allows us to make sense of how things work around us, promotes critical thinking, and allows to do …

This topic covers: - Solving one-variable linear equations - Solving one-variable linear inequalities