Yes, I think it can be done.
First, in your DB backup, you have to look for references to the old domain name and replace them with your new domain name.
Second, if you have modified some core files, do the same in your files backup: look for references to the old domain name and replace them with your new domain name.
I suppose that the DB details (host, name, user, pass, etc.) not change nor the config.php file.
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