A total of 18816 tiles were used for decorating the rooms, kitchen and bathrooms for all apartments in a building. Each apartment had 2 rooms,
1 kitchen, 2 bathrooms. The number of tiles used are given below:
1 Kitchen = 64 tiles, 1 Room = 84 tiles and 1 Bathroom = 52 tiles
How many apartments are there in the building?
Please explain this question to me. I didn't understand.