📖 Math Dictionary

Variable

Definition

A variable is a symbol (usually a letter like x, y, or z) that represents an unknown or changeable value in a mathematical expression or equation.

💡Example

In the equation y = 2x + 5, both x and y are variables. If x = 3, then y = 2(3) + 5 = 11. The values can change depending on the situation.

🎓Used in Grades

Grades 5-12KS2 to A-Level

📚Learn More

linear equations →algebraic expressions →

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