👉 The term "externum" in mathematics refers to a variable that is not part of any equation or expression. In other words, it represents an unknown quantity or parameter that is used to solve for another variable. This can be particularly useful when dealing with equations involving multiple variables and constants. For example, if you are solving a system of equations, one variable might represent distance traveled, while the others represent time, acceleration, etc. In mathematical notation, "externum" often appears in contexts where
