If you have copied the entire matter from another website, it is better just to delete it.
If you have copied only parts of the content, go to the edit mode and rewrite it in your own words. There should not have any copied material there.
If your URL is a copied one, just delete the whole hub and write a new hub, after going through the FAQ properly. Hubpages do not tolerate any duplicate material. Please remember it is not a article submitting directory.