To list an article for deletion after adding {{subst:afdx}} at the top, you have to do the following:

I.
Create its [[Wikipedia:Articles for deletion/AfDx doc ({{{1}}} nomination)|AfD subpage]].

Add this text:
{{subst:afd2|pg=AfDx doc|text=Reason}} ~~~~

II.

Add this text:
{{subst:afd3|pg=AfDx doc ({{{1}}} nomination)}}
Include [[AfDx doc]] ({{{1}}} nomination) in the edit summary.