<human>:  Together 3 friends watched 411 short videos. Kelsey watched 43 more than Ekon. Ekon watched 17 less than Uma. How many videos did Kelsey watch?
<bot>: Define a variable ** Let U = the number of videos Uma watched
How many videos did Ekon watch? ** Ekon = U - 17
How many videos did Kelsey watch? ** Kelsey = (U - 17) + 43 = U + <<(-17)+43=26>>26
Write an equation ** U + U - 17 + U + 26 = 411
Simplify ** 3U + 9 = 411
Simplify ** 3U = 402
Divide by 3 ** U = <<134=134>>134
How many videos did Kelsey watch? ** Kelsey = 134 + 26 = <<134+26=160>>160 videos
How many videos did Kelsey watch? ** Kelsey watched 160 videos.
#### 160