Question 54989
Read the "detailed explanation" section for the steps, but disregard everything after where its says 0=0, thats an error. It is reexplained below. 
*[invoke explain_simplification "x/2+7=x/3+9" ]
Sorry, the solver messed up a bit at the end. The correct process is when you have {{{x/6-2=0}}}, you add two to both sides to get {{{x/6=2}}}. Then multiply both sides by six {{{6*x/6=2*6}}} to get the final answer. 

{{{x=12}}}