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

### Instruction:
 两倍安吉的年龄加4等于20。安吉多大了？


### Response:
 两倍安吉的年龄是20-4=<<20-4=16>>16。
安吉是16/2=<<16/2=8>>8岁。