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

### Instruction:
9 years from now, John will be 3 times as old as he was 11 years ago. How old is he now?

### Response:
 John sasa ana umri wa 9 - 11 = <<9-11=-2>>-2 miaka.