This foldable is perfect for students to VISUALLY see the difference between equations with one, none, or infinite solutions. This is a no prep (no thinking) foldable because I included a key for you to use if you choose :) Simply copy the first 2 pages back to back (page 2 has to be turned opposite of page 1). And then the students fold it like they are mailing a letter.
I found the idea of 'balancing scales' online and extended it into these notes. I hope you enjoy them! My students seemed to really grasp the whole idea of 'number of solutions' after going through this foldable.