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

### Instruction:
42 raspberries, blackberries, and blueberries were picked in total. If half of all the berries had been raspberries, and a third of the berries were blackberries, how many of them were blueberries?

### Response:
 Ikiwa matunda 42 ya matunda ya matunda, matunda ya matunda, na matunda ya bluu yalichumwa, na nusu yao ilikuwa matunda ya matunda, basi kulikuwa na 42/2 = <<42/2=21>>21 matunda ya matunda.
Ikiwa theluthi moja ya matunda yalikuwa matunda ya matunda, basi matunda 42/3 = <<42/3=14>>14 ya matunda ya matunda yalichumwa.
Jumla ya matunda ya matunda na matunda ya matunda ilikuwa 14+21 = <<14+21=35>>35
Ikiwa matunda ya matunda na matunda ya matunda 35 yalichumwa, basi matunda ya bluu 42-35 = <<42-35=7>>7 yalichumwa