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

### Instruction:
Tony read 23 books, Dean read 12 books and Breanna read 17 books. Tony and Dean read 3 of the same books and all three had read the same book as well. In total how many different books have Tony, Dean, and Breanna read?

### Response:
 Tony na Dean pamoja walikisoma vitabu 23 + 12 = 35
Vitabu 3 kati ya hivyo vilikuwa vinarejea, hivyo Tony na Dean pamoja walikisoma vitabu 35 - 3 = 32 tofauti.
Ukiweka vitabu ambavyo Breanna alisoma, wote watatu walikisoma vitabu 32 + 17 = 49
Kwa sababu vitabu vinahesabiwa mara tatu (vya Tony, vya Dean na vya Breanna), kila kitabu kinahesabiwa mara 2 zaidi.
Jumla ya vitabu tofauti vilivyosomwa ni 49 - 2 = 47.