Before we help with this question, I'd like you to try it on your own. What did you try on this question? Where did you get stuck? What does x/d is an integer tell you? That will probably give you a big hint as to how to tackle this one..
Tim Sanders Manhattan GMAT Instructor
Follow this link for some important tips to get the most out of your forum experience: https://www.manhattanprep.com/gmat/forums/a-few-tips-t31405.html