Wanted to pool a few resources here that I have come across to use for solving equations – there’s a mix of one-step and two-step stuff out there of course and one with a number of ‘game’ type activities was here from Izlomek. There is also the solve me mobiles that are quite a good introduction. Keep in mind the clothesline maths ideas too!
I also thought Sarah Carter had some good resources on her site that she provides downloads for etc. for free. A number of these were one-step or variable on one side, but there were also some for variables on both sides and some overall rules to follow.