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

### Instruction:
 代托纳海滩每年有26次鲨鱼目击事件。代托纳海滩的鲨鱼目击事件数量是开普梅的三倍加5。开普梅有多少次鲨鱼目击事件？


### Response:
 设开普梅的鲨鱼目击事件数量为x
26=5+3x
21=3x
x=<<7=7>>7