Substituting 1 for \( x \) in the equation \( 5x + 3 = x \cdot 5 + 3 \) demonstrates the Commutative Property of Multiplication.
This property states that the order in which two numbers are multiplied does not affect the product. In this equation, \( 5x \) and \( x \cdot 5 \) are interchangeable, highlighting this property.