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

### Instruction:
 亚历克斯有一些新衬衫。乔比亚历克斯多3件新衬衫。本比乔多8件新衬衫。如果本有15件新衬衫，亚历克斯有多少件新衬衫？


### Response:
 乔有15-8=<<15-8=7>>7件新衬衫。
亚历克斯有7-3=<<7-3=4>>4件新衬衫。