Marla noticed that her friend Ron had three times as many pieces of candy as she did. She toldhim, “If you give me seven pieces of your candy, we’ll have exactly the same number ofpieces.” Ron responded, “I didn’t know that until you mentioned it. But I’ll make you a deal: Ifyou can show me how to solve this puzzle using algebra, I’ll give you the seven pieces.”One minute later, Ron was shocked to see that Marla had solved it perfectly. Can you do the same?