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

### Instruction:
 Alex a 4 nouveaux t-shirts. Joe a 3 t-shirts de plus que Alex. Si Ben a huit t-shirts de plus que Joe, combien de nouveaux t-shirts Ben a-t-il ?


### Response:
 Joe a 4+3=<<4+3=7>>7 nouveaux t-shirts.
Ben a 8+7=<<8+7=15>>15 nouveaux t-shirts.