I am extremely adapt at solving double-sided equations but terrible at writing them. I often get a lot of these questions wrong due to this.
Therefore, I have a suggestion.
As long as the equation contains a variable, the three numbers needed in the equation (varies on question) and the correct answer, even if it's flipped, it will still be correct. However, to make sure students know they might have an incorrect equation while they still have the proper numbers, there could be a special message that says "Correct value for *variable*. However, it looks like your equation is incorrect. We recommend rewatching the previous video and, if you still don't understand, to ask a fellow khan user in the 'questions' section." And so forth.
Thanks for listening,