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In this video, you will learn in a simple way that is not found in any textbook. A very important subject for ENEM and other entrance exams. In many questions, you will work with the rule of three, solving the questions directly or using it as a mathematical tool to solve others. And you don't want to miss a question because you forgot this concept, which despite being basic, is very important. Click on the link below and do the exercises. If you have any questions, leave them in the comments and I will answer them for you. Link to the exercises: https://goo.gl/g8eAbp Don't forget to subscribe to the channel and activate notifications, so you don't miss any classes and achieve your goal.