There are several layers to solving equations that can be unpacked using a task analysis approach. This includes written and mental steps (such as what we teachers mean when we tell a student to do the same thing to “both sides of the equation”). Here is how I develop the concept of equations and solving.
To unpack the layers for students, I have had a lot of success with the scaffolded handouts below (see last photo of example of what to write.) Here is a link to a Dropbox folder with all 4 handouts, in WORD format. Feel free to use and revise as desired.