I have gained a ton since studying for the GMAT. I've had to take breaks because of school but I plan on working hard to learn the material. Anyway, I wanted to see if you guys had any recommendations as far as getting solid at algebra. Links? Books I should buy? I tried some problems earlier today from GMATPrep and I had a tough time with em. It's kind of embarrassing. I'm about to post a link to a YouTube video of the problems I tried earlier today. If you guys could explain them to me, that would be cool. I knew some of them and was unsure on a few, but most were very confusing. Anyway, I really need help and am willing to take the time. Thanks.

here's the link: https://www.youtube.com/watch?v=C2qtyREHlrw