Open Middle Modification Question

Good afternoon. Not sure if this is the right place to post this question or not.

I would like to set up a Desmos activity for students to work through an Open Middle problem. I found an awesome example for this by Paul Jorgens, and was wondering if someone could help walk me through how to modify his work for other problems.

Below you should find a link to a custom activity by me. The first slide is Jorgens’s work, and the second slide is the small attempts that I started to make at modifying it, but I quickly realized this is quite a bit over my head.