The equation "x = -2" indicates that the variable x is equal to the value -2. This means that whenever x is referenced in an equation or expression, it can be replaced with -2. This is a simple example of an algebraic equation where one side is defined by a specific value. In a number line, -2 is located two units to the left of zero. It is a negative integer, which means it is less than zero. Understanding this concept is fundamental in mathematics, as it helps in solving equations and understanding the properties of numbers, including integers and real numbers.