I searched this forum looking for something about the topic but couldn't find it. So, I am opening it myself.
I use Slackware and when I downloaded the new 14.0 version I did for my new computer, an 64 AMD. I installed and configured it and, when I tried to run Adobe Acrobat Reader, it did not work. I researched in web and found that I needed to create a multilib in order to run 32 bits on my Slackware 64.
This is a fine article by Alien Bob on how do it properly. I hope you enjoy.