Below is an instruction that describes a task. Write a response that appropriately completes the request in Swahili. Please answer in Swahili.

### Instruction:
Tracy has been collecting novels from her friends to donate to the Children For The Future charity organization. In the first week she collects a certain number of books. In the next five weeks, she collects ten times as many books as she did in the first week. How many books did she collect in the first week if she has 99 books now?

### Response:
 Katika wiki ya kwanza, alikusanya vitabu x.
Katika wiki tano zifuatazo, alikusanya vitabu 5x.
Hivyo, ana vitabu x + 5x = <<x+5x=6x>>6x.
Kwa kuwa ana vitabu 99, 99 = 6x.
Hivyo, x = 99/6 = <<99/6=16.5>>16.5 vitabu.