第1课时方程(组)的实际应用主要知识点一、要点回顾1.列方程(组)解应用题的步骤:(1)仔细审题,弄清楚题意及有关事物的概念;(2)找出题中明显的等量关系和隐含的等量关系;(3)选设未知数,并用含这个未知数的代数式表示其他未知量;(4)利用未曾用过的等量关系列方程;(5)解方程; Lesson 1 Practical Application of Equations (Groups) Key Points I. Points to review 1. List equations (groups) Steps to solve the problem: (1) Carefully examine the questions, clarify the meaning of the questions and the concept of related things; (2) find Equivalent relations and implicit equal relations in the subject; (3) Select unknowns and use algebraic expressions containing this unknown to represent other unknowns; (4) Utilize unequal equations of equal magnitude; (5) )Solving equations;