Solving Equations with self checking and different problems for the students

Our first unit is solving equations. I would like an activity where the students put in the process and self-check. I would also like every student to have different problems as well. Same as DeltaMath. Thank you so much for your help!

This is an extremely broad request and answers depend on what you want your equations to look like. There are probably a lot of basic equation types represented in other threads. A good place to start would be to browse other activities posted, or to post your own base activity for help.