Algebra problem from the USA IMO training

Do you have what it takes to solve this Algebra problem. Give it a try! Background Music: Wading by Vincent Rubinetti https://vincerubinetti.bandcamp.com/album/the-music-of-3blue1brown Software that I used to write down the materials: Xournal++ https://xournalpp.github.io/ Video Editor: Inshot( An android app) Screen Recorder: OBS Studio https://obsproject.com #mathematics #algebra #problemsolving #olympiad #beauty #equation #matholympiad