A family of Microsoft word processing software products for creating web, email, and print documents.
Personally, I find the way that the equation editor works exasperating. I hope Daniel (who responded to the original question) "gets" it better than I do.
Reading UTN28-PlainTextMath-v3.pdf can help, but one of the problems with that is that some of the stuff in there is not supported in Word.
But...
I could not successfully apply the alignment to both "=" characters in D Anderson AO's example using the right click method. So instead I used the dropdown for the whole equation to switch to Linear mode,
- located the k before the first "="
- clicked immediately after that k
- typed a space character
- typed an & character
then repeated that for the "k" before the second "=".
Then switched back to Professional mode.
That seemed to insert the two alignment points and did the left alignment of the two equations.
But let us know if that still doesn't work for you - in that case, if you can post an example of what you have on dropbox or some such, it will probably help.