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

### Instruction:
If I give my brother 2 marbles I will have double his number of marbles, but my friend will have triple the number I do. The total number of marbles we have together is 63. How many marbles do I have?

### Response:
 Acha X iwe idadi ya mabulinge ninayo.
Ikiwa nitampa ndugu yangu 2 mabulinge, nitabaki na mabulinge X-2.
Na ndugu yangu atakuwa na mabulinge (X-2)/2.
Na rafiki yangu atakuwa na mabulinge (X-2)*3.
Hivyo jumla ya mabulinge ni X-2 + (X-2)/2 + (X-2)*3 = 63.
(X-2)*9/2 = 63.
X-2 = 14.
X = <<16=16>>16 mabulinge.