Students give you the simplest method, and hope to adopt it.

Solution: Set the camel to fall after y days.

23000+5Y-500Y+{(Y- 1)？ ÷2+(Y- 1)÷2}×5=0

A positive number of y equals 74.

(Y- 1) Because camels don't eat radishes on the first day. If you understand that they ate radishes on the first day and died in 73 days.