Here we have an

**equation**that says 4x − 7 equals 5, and all its parts: A Variable is a symbol for a number we don't know yet. It is usually a letter like x or y. A number on its own is called a Constant. A Coefficient is a number used to multiply a variable (4x means 4 times x, so 4 is a coefficient)Beside this, what is an example of an expression?

Variables in Mathematical Expressions. In algebra, we begin to see variables, or letters that are used to represent numbers. 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.What is the equation?

In mathematics, an

**equation**is a statement of an equality containing one or more variables. Solving the**equation**consists of determining which values of the variables make the equality true. An identity is true for all values of the variable.What is an example of a formula in math?

noun. The definition of a

**formula**is a group of**mathematical**symbols that express a relationship or that are used to solve a problem, or a way to make something. A group of**math**symbols that expresses the relationship between the circumference of a circle and its diameter is an example of a**formula**.