Have to agree that content to backlinks importance is 30/70%. However, I decided to build an authority site - original articles 1,000 to 1,500 words or more and Google listed the site highly for several key phrases WITHOUT backlinks, once they found the site. With articles that are 350 to 500 words long, you need backlinks.
Well if you begin a blog with very poor content although you have a lot of backlinks it will be difficult to be indexed quickly until you work in your content. Also I have seen how working in my content I have been ablo to go fron page 5 to 1 in some hours.
Content is important for increase your backlink,search only find your relevant content and if your backlink not relevant content not display in search engine.