Answer:
Each dress costs $29.
Step-by-step explanation:
Let's represent the cost of each dress as "D" dollars.
Carolina bought four dresses, so the total cost of the dresses is 4D dollars.
She also bought a necklace for 12 dollars.
According to the information given, the total cost of the four dresses and the necklace is $128.
So, we can write this equation:

Now, let's solve for D:
Subtract 12 from both sides of the equation:


Now, divide both sides by 4 to isolate D:


So, each dress costs $29.