What is a variable in math equations?
It is often confusing to see letters in a math problem. Most math problems deal strictly with numbers and operations on those numbers like addition, subtraction, multiplication, and division.
A variable is a letter that is used to represent any number that can be "plugged in" to the math equation. For example, the equation 3x+2=10 shows an addition equation that has a letter "x". This letter means that there is a specific unknown number that will solve this math equation.
Another example is something like x+8. If you substitute any number into this equation for "x", you will get a different value each time.