How do I save a pages document into a format a pc can open?
How do I save a pages document that a pc can open. eg jpeg, rtf pdf etc?
I assume you're using Pages on an iOS device since that is the forum you've posted in.
Tap on the wrench/spanner at the upper right & choose Share & Print. From there you can choose to e-mail or save to iTunes & then choose a format such as PDF or Word.
If you should be asking about Pages on a Mac, use File > Export & choose Word or PDF.