error al abrir documetos con extension docx

not a problem saving docx format, but when opened with Word 2010, because I do not count with printer, so I went to a cyber
coffee and despite having created the formatted document 2007/2010, with libreoffice writer could not be opened in Word 2010

an apology because translators are very bad, I hope you can help me, thanks.

What prevents you from saving document in a different format? MS Office 2007/2010 open documents in Microsoft Word 97/2000/XP/2003 (.doc) format without any problems.