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

### Instruction:
 三个朋友一起看了411个短视频。凯尔西比埃康多看了43个。埃康比乌玛少看了17个。凯尔西看了多少个视频？


### Response:
 令x代表乌玛看的视频数量
埃康 = x - 17
凯尔西 = (x - 17) + 43 = x + <<(-17)+43=26>>26
总数 = x + x - 17 + x + 26 = 411
3x + 9 = 411
3x = 402
x = <<134=134>>134
凯尔西 = 134 + 26 = <<134+26=160>>160个视频