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

### Instruction:
 Selena na Josh walikuwa wakikimbia mbio. Pamoja walikimbia maili 36. Josh alikimbia nusu ya umbali ambao Selena alikimbia. Selena alikimbia maili ngapi?


### Response:
 Hebu J = umbali wa Josh
2J = umbali wa Selena
J + 2J = 36
3J = <<36=36>>36 maili
J = <<12=12>>12
2J = <<24=24>>24 maili
Selena alikimbia maili 24.