Possible Duplicate:
Does one use 'a' or 'an' before the word X-Ray?

I understand that the decision between "a" and "an" is generally based on what vowel sound the following word begins with.

In the case of "x" I am not sure, it could be either:

  • An ehcks
  • A ecks

merged by RegDwigнt Oct 19 '12 at 10:37

This question was merged with Does one use 'a' or 'an' before the word X-Ray? because it is an exact duplicate of that question.