My question has been closed as a duplicate. However, I'm having trouble with the answers to that other question. What can I do now?
Questions that are closed needn't stay closed. You're encouraged to edit your original question to explain why the answers on the duplicate don't help you; this can lead to your question being reopened. If you think that you've edited it enough to be distinct from the duplicate, you can flag it for moderator attention and one of the moderators can reopen it.
(The community also has the power to reopen it: it takes 5 votes to do so or one from a moderator. Given that people are probably less aware that a question is awaiting being reopened than they are of one that is in the process of being closed, I think that flagging for moderator attention is easier and absolutely fine in this case.)