Thank you to Paula for sharing a group activity for Linear Equations called Linear Equations Roundtable.  I'll share Paula's explanation of the activity below.

"Students are put into groups of 4.  Each person has a step to complete before it gets passed to the next person, who checks the previous work, and then completes the next step.  I usually print each sheet on a separate piece of paper and rotate around the group giving each person a chance to be "person 1"."

Sounds like this Roundtable activity could help students hold each other accountable as well as promote some valuable communication between the steps.  Hopefully students that struggle with their step will get assistance from peers during the checking phase and they will also see solutions done properly when they are responsible for a different step.

Enjoy!