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

### Instruction:
 Tony alisoma vitabu 23, Dean alisoma vitabu 12 na Breanna alisoma vitabu 17. Tony na Dean walikisoma vitabu 3 sawa na Breanna. Jumla ya vitabu tofauti walivyosoma Tony, Dean na Breanna ni vingapi?


### 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.