Suppose this is an X test, then test x- 1 times a few days ago, according to the meaning of the question: 84 times (x- 1)+ 100=86x, and the solution x=8. Analysis: 84 times (x- 1) is the total score of the tests in the previous days, plus 100, the result is the total score of these tests, and 86x is also the total score of these tests, so it is equal.
Methods to improve math scores
1. Understand the basics: Mathematics is a basic subject, and many problems are based on basic concepts. Therefore, it is very important to understand and master the basic knowledge. This requires students not only to remember formulas or theorems, but also to understand their meanings and applications when learning new concepts.
2. Do more exercises: Mathematics, like other skills, needs a lot of exercises to improve. Doing more exercises can help students better understand and apply what they have learned, cultivate the thinking of solving problems and improve the speed of solving problems.
3. Establish mathematical thinking: Mathematics is not only memory and imitation, but also a way of thinking. Students should learn to think in mathematical ways, which requires students to actively use what they have learned when solving problems, rather than simply applying formulas.
4. Sort out the wrong questions: The wrong questions are important resources in the learning process. Students should sort out their mistakes, analyze the causes of mistakes and find solutions. This can help them better understand their weaknesses in learning and avoid making the same mistakes again.
5. Participate in discussion and group study: discussing math problems with others or studying together in groups can help students understand problems from different angles and stimulate their thinking vitality. At the same time, it also helps to improve their cooperation and communication skills.
6. Arrange your time reasonably: Learning mathematics also requires good time management skills. Students should arrange their study time reasonably, not only to ensure that they have enough time to understand and master knowledge, but also to set aside enough time for review and practice.
7. Keep a positive attitude: Mathematics may be challenging for some students, but only by keeping a positive attitude can we face the challenge better. Students should encourage themselves and believe that they have the ability to improve their math scores.