Unlike Nokia Lumia phones, the X XL and X+ come with Android operating system which means you can root them if you want. So even those do not come with Play store, it is still android with a custom UI running on top.
An XDA developer was able to root all three of them Nokia X XL X+. The guide is quite simple. First download the framaroot.apk from here and install it on your Nokia phone. Then click on Grandalf and reboot your phone.
That is it – no more following lots of sentences just to root your Android phone. However keep in mind that rooting voids the warranty. Fortunately you can download and flash the stock X ROM to get everything back to factory settings. That way the customer support people will not be able to find out if you ever rooted your phone.