The statement "X Equals 40" indicates that the variable X has a value of 40. In mathematics, variables are symbols used to represent numbers or values that can change. When we say X equals 40, we are defining the specific value of X in a given context, such as an equation or a problem. This concept is fundamental in algebra, where equations often involve finding the value of a variable. For example, if we have the equation X + 10 = 50, we can determine that X equals 40 by subtracting 10 from both sides. Understanding this principle is essential for solving various mathematical problems.