Is it possible to decrypt MD5 hashes?

Question

Someone told me that he has seen software systems that:

1. retrieve MD5 encrypted passwords from other systems;
2. decrypt the encrypted passwords and

Answer 1

MD5 is considered broken, not because you can get back the original content from the hash, but because with work, you can craft two messages that hash to the same hash.

You cannot un-hash an MD5 hash.