Final answer:
The expression for the visit cost for one person is AED x+4, where x is the individual admission cost and the parking fee is divided by four.
Step-by-step explanation:
The total cost of the visit for a family of four to an amusement park is represented by the expression AED 4x+16, where x is the cost of admission per person. To find the cost of the visit for one person, we need to separate the variable part of the expression from the constant. Since the parking fee of AED 16 is a constant and does not change with the number of people, the cost for one person would be simply x (the admission cost per person) plus a quarter of the parking fee (AED 16 divided by 4). Therefore, the expression for the cost of the visit for one person is AED x+4.