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

### Instruction:
Francis' family has 2 ukuleles, 4 guitars, and a certain number of violins. Each ukulele has 4 strings. Each guitar has 6 strings. Each violin has 4 strings. If the total number of strings among the ukuleles, guitars, and violins is 40 strings, how many violins does Francis' family have?

### Response:
 Kila ukulele lina nyuzi 4. Kuna ukulele 2, hivyo kuna 2 x 4 = <<2*4=8>>8 nyuzi za ukulele.
Kila gitaa lina nyuzi 6. Kuna gitaa 4, hivyo kuna 4 x 6 = <<4*6=24>>24 nyuzi za gitaa.
Kila kinanda lina nyuzi 4. Kuna idadi fulani ya vinanda.
Jumla ya nyuzi ni 40.
Hivyo, 8 + 24 + (4 x idadi ya vinanda) = 40.
Toa 32 kwa pande zote za usawa wa mshale.
(4 x idadi ya vinanda) = 8.
Gawanya pande zote za usawa wa mshale kwa 4.
idadi ya vinanda = <<8/4=2>>2.