In pre-algebra, variables are symbols that represent numbers or values. Typically, they are denoted by letters such as x, y, or z.
Why Use Variables?
Variables allow mathematicians to write expressions and equations in a generalized form. This makes it easier to formulate and solve problems across different scenarios.
Common Operations with Variables
- Addition: x + y
- Subtraction: x - y
- Multiplication: x * y or xy
- Division: x / y
Example Problem
If x = 5 and y = 3, then x + y = 8.