📖 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