Algebra 1 · Expressions & Equations
Variable
Algebra 1 · Expressions & Equations
Definition
A variable is a letter or symbol that represents a number that can vary or is unknown.
Examples
- In 3x, x is the variable.
- In 2a + b, a and b are variables.
Key rule
A variable holds the place of a number you are solving for.
Memory hook
Variable can vary - its value is not fixed yet.