The expression that models this situation is given by:
[tex]\frac{x-1}{5}[/tex]
---------------------------
- The number is unknown, so it is called x.
- The difference between 3 and 2 is 3 - 2 = 1, between 10 and 5 is 10 - 5 = 5, and so on. Thus, the difference between a number and 1 is x - 1.
- One fifth of a number is the number divided by 5. Thus, in this context, the expression that represents one fifth of the difference of a number and 1 is given by:
[tex]\frac{x - 1}{5}[/tex]
A similar problem is given at https://brainly.com/question/20742606
