When you substitute a number for the variable in an open sentence, the resulting statement is either true or false. If the statement is true, the number is a solution to the equation or inequality.
EQUATION- a statement that the values of two mathematical expressions are equal (indicated by the sign =).
INEQUALITY-a mathematical relationship between two expressions and is represented using one of the following: ≤: "less than or equal to" <: "less than" ≠: "not equal to" >: "greater than"
