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

### Instruction:
 Pembe tatu za pembetatu zina jumla ya nyuzi 180. Pembe kubwa zaidi ni mara 5 zaidi ya pembe ndogo. Pembe ya kati ni mara 3 zaidi ya pembe ndogo. Ni nyuzi ngapi pembe ndogo ina?


### Response:
 Hebu x iwe pembe ndogo.
Unganisho la hizo tatu ni x + 3x + 5x = 9x.
Hivyo 9x = 180.
Hivyo x = <<20=20>>20.