Absolutely Not So Simple

Tried going through GMATClub's chapter on Absolute Value, 'tried' being the key word here.
I thought it was going to simple restate that the absolute value is the distance between two points. However, it took me back to my Class XI days of trying to solve absolute value questions. Damn my sister, she's lost my theory notebook from my tuition days, and now I need to redo all the thinking for this chapter.
It's not as simple as it sounds, need to try my luck again. In other words, bhai samajh mein hi nahi aaya. Probably needs a fresh mind. If it still doesn't work, Aman Chawla to the rescue I guess.