Is there a way to hide the plain text so that Google can find the articles?

Selected answers from the Dumb SEO Questions G+ community.

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  Tim Capper: If you dont want it to appear in search but to be visible to google use rel="noindex", "follow"
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  Justin Y: + if it`s possible to convert the PDF to a full size image and then slice it in photoshop, I would do that. Then you can retain the look and insert the text as true text so it can be crawled. Of course this all depends on your skill level, but this is something that I would look to do first. I`m not sure on how else you can make it look legit if your inserting the PDF directly on the page like an iframe if that`s what you`re referring too. If that is the case, it won`t look like a magazine article it`ll look like a frame-in.
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  Dave Elliott: Write a decent intro to the page/document and then use adobe pdf pro to tag it. It is surprising how much optimisation you can actually do on a pdf! Couple of links from when i had to learn all this a few months ago! I can`t remember(or be bothered to read) which i found more useful..... i suspect it wont be the hubspot one.