!HELP! Student trips
When your class visited the aquarium, the cost of the trip reached the maximum amount allowed for a student activity. The total cost included US $ 45 for transportation and US $ 75 for tickets.

Now your course wants to plan another trip to the Museum of Natural History. You already know that the total cost of the tickets will be US $ 48. How much money will they have left to spend on transportation?

Select the equation that you could use to determine the value of x, the maximum amount that transportation to the museum could cost.