An example of a mathematical expression with a variable is 2x + 3. All variables must have a coefficient, a number that is multiplied by the variable. In the expression 2x + 3, the coefficient of x is the number 2, and it means 2 times x plus 3.
For example, 10x + 63 and 5x – 3 are examples of algebraic expressions. Let's take a review of the terminologies used in an algebraic expression: A variable is a letter whose value is unknown to us. For example, x is our variable in the expression: 10x + 63.
