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

### Instruction:
 Luis alihitaji kununua soksi. Alinunua jozi 4 za soksi nyekundu na jozi 6 za soksi buluu. Jumla, alitumia $42. Ikiwa soksi nyekundu zina gharama ya $3 kila moja, alilipa kiasi gani kwa kila jozi ya soksi buluu?


### Response:
 Hebu B iwe gharama ya soksi buluu.
4*3 +6*Y =42.
12 + 6*Y=42.
6*Y =30.
Y = <<5=5>>5