I'm too new here to add this as a comment so I'll try it as a new question.
I tried to follow the instructions in the best answer to this question: How do you easily add equation numbers to Microsoft Word 2010 equations but when I highlight the entire table as instructed in step 14, "insert equation" gets grayed out (step 15 and the last step -- things were going so well too!). Does anyone have any idea what I'm doing wrong?
The answer was given by @r-Schultz but that user hasn't been seen in a couple of months. I hope the @ works to send them a note though.