Answer:
Option 4 -

Explanation:
Given : Laci and Leon are saving money to go to an amusement park. Laci has $1 more than 4 times the amount of money Leon has. Together, they have $76.
To find : Write an equation to determine how much money they have together ?
Solution :
Let the Leon has 'x' amount.
Laci has $1 more than 4 times the amount of money Leon has.
i.e. Laci has '4x+1' amount
Together, they have $76.
i.e.

Therefore, the equation to determine how much money they have together is

So, Option 4 is correct.