Imbalance theme column size question

Sorry, not sure where to post this!

I have searched high and low for the answer to this question AND I have butchered my CSS trying to figure it out!

I want to REMOVE the far left column in the blog posts, thereby INCREASING the width of the actual post article/content.

Here is an image illustrating what I mean:
https://www.dropbox.com/s/wmqfsmp39i0p1g8/imbalancequestion.png