a statement which contains a variable and becomes either true or false depending on the value that replaces the variable
A statement that contains at least one unknown. It becomes true or false when a quantity is substituted for the unknown. (e.g.,x + 5 = 9, y - 2 = 7).
A statement that contains at least one unknown. It becomes true or false when a quantity is substituted for the unknown. For example, 3 + x = 5.
A number sentence in which one or more variables hold the place of missing numbers. For example, + 3 = 5.
A statement that contains at least one unknown. It becomes true or false when a quantity is substituted for the unknown. Example: 4 + n= 5 becomes true when n = 1.
In the jargon of the new mathematics of the 1960s, an open sentence is a sentence in which there are specific numbers which, when used to replace the variables, will allow the resulting expression to evaluate to true.