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4件新衬衫。乔比亚历克斯多3件新衬衫。如果本比乔多8件新衬衫，本有多少件新衬衫？


### Response:
 乔有4 + 3 = <<4+3=7>>7件新衬衫。
本有8 + 7 = <<8+7=15>>15件新衬衫。