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

### Instruction:
 Sam na Drew wana umri wa pamoja wa 54. Sam ni nusu ya umri wa Drew. Sam ana umri gani?


### Response:
 Hebu x iwe umri wa Drew.
Sam ni (1/2) * x
x+(1/2) * x = 54
(3/2) * x = 54
3 * x = 108
x = <<36=36>>36
Sam ana umri wa miaka 18.