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

### Instruction:
 Mark na Peter walichimba mabwawa katika viwanja vyao vya nyuma. Bwawa la Mark ni kirefu kwa futi 4 kuliko mara 3 ya bwawa la Peter. Ikiwa bwawa la Mark ni kirefu kwa futi 19, kina kirefu gani bwawa la Peter?


### Response:
 Tumia p kama idadi ya futi katika bwawa la Mark
3*p+4=19
3*p=19-4=15
3p=15
p=<<5=5>>5