初级中学课本《代数》第一册(以下简称新教材)第三章《一元一次方程》和第四章《一元一次不等式》,是在原全日制十年制学校初中数学课本(试用本)《代数》第一册(以下简称原教材)第三、四章的基础上修改的。章名与原教材一致,教学内容也基本一致。新教材第三章包括等式的概念和性质、方程的有关概 The junior middle school textbook “Algebra” Volume 1 (hereinafter referred to as the “new textbook”), Chapter 3 “Uniquitous Equations” and Chapter 4 “One Dollar Once Inequality”, is the original full-time 10-year school junior high school mathematics textbook (trial version) "Algebra The first volume (hereinafter referred to as the original textbook) was revised based on the third and fourth chapters. The chapter name is consistent with the original textbook, and the teaching content is basically the same. The third chapter of the new textbook includes the concepts and nature of equations, and the related equations of equations.