To find the original price of each apple, let's denote the original price of each apple as
Since Eve bought 12 apples and received a 25 cent discount per apple because she purchased 4 or more, the price per apple after the discount becomes
The total cost for 12 apples with the discount is given by:
So, the correct equation to solve the problem algebraically is
This matches your last option:
12(x−0.25)=15.