• ### Algebraic Equation

An equation that contains one or more variables.

• ### Algebraic Expression

An expression that contains one or more variables.

• ### Coefficient

The number that is multiplied by the variable(s) in a single term. In the term 67rt, rt has a coefficient of 67.

• ### Constant

A term that does not contain any variables.

• ### Empty Set

A set with no members; also called the null set. Denoted Ø.

• ### Equation

Sets two expressions equal to each other.

• ### Expression

A "phrase" that represents a number.

• ### Like Terms

Terms that contain the exact same variables raised to the same exponents, possibly with different coefficients.

• ### Multiplicative Inverse Property

For every a, there exists a number such that a× = 1. is called the reciprocal of a, or the multiplicative inverse of a.

• ### Null Set

A set with no members; also called the empty set. Denoted Ø.

• ### Quotient Property

a× = .

• ### Reciprocal

The number is called the reciprocal of a. When a is multiplied by its reciprocal, the result is 1.

• ### Replacement Set

A set of values from which to find a solution.

• ### Simplified Form

The form of an expression after like terms have been combined; equivalent to the original expression.

• ### Solution

Any value of a variable that makes the specified equation true.

• ### Solution Set

The set of all variables that makes the specified equation true.

• ### Term

A single number or the product of a number and one or more variables.

• ### Variable

A symbol used to represent a number.

• ### Zero Product Property

If ab = 0, than a = 0 or b = 0 (or both).