An equation that contains one or more variables.
An expression that contains one or more variables.
The number that is multiplied by the variable(s) in a single term. In the term 67rt, rt has a coefficient of 67.
A term that does not contain any variables.
A set with no members; also called the null set. Denoted Ø.
Sets two expressions equal to each other.
A "phrase" that represents a number.
Terms that contain the exact same variables raised to the same exponents, possibly with different coefficients.
For every a, there exists a number such that a× = 1. is called the reciprocal of a, or the multiplicative inverse of a.
A set with no members; also called the empty set. Denoted Ø.
a× = .
The number is called the reciprocal of a. When a is multiplied by its reciprocal, the result is 1.
A set of values from which to find a solution.
The form of an expression after like terms have been combined; equivalent to the original expression.
Any value of a variable that makes the specified equation true.
The set of all variables that makes the specified equation true.
A single number or the product of a number and one or more variables.
A symbol used to represent a number.
If ab = 0, than a = 0 or b = 0 (or both).