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

### Instruction:
 Tim 5岁。他的表兄Rommel是他的三倍年龄。他的另一个表兄Jenny比Rommel大2岁。Tim比Jenny小几岁？


### Response:
 Rommel是5 x 3 = <<5*3=15>>15岁。
Jenny是15 + 2 = <<15+2=17>>17岁。
所以，Tim比Jenny小12岁。