How to Eliminate Duplicate Contents in Two Articles?

Hi,

I have two articles on my site. Both articles share the the same paragraph, describing the steps to fix a computer error.

How to eliminate the duplicate contents?

If I put that paragraph into a new article, then let the old two links to the new one. Then the duplicate contents are eliminated. However, there are too few words in the new article, which makes it as a thing content. If I makeup many words for the new article, as they are actually not useful, so will decrease the quality of the article.