利用不等式(组)解决实际问题极富挑战性,近年来全国各地的中考试题中常有这类试题,值得同学们在平时的学习中认真品味、研讨.下面选编几道中考试题,和同学们探索和体会这类问题的解题规律.例1(2004年吉林)小王家里装修,他去商店买灯,商店柜台里现有功率为100瓦的白炽灯和40瓦的节能灯,它们的单 The use of inequalities (groups) to solve practical problems is extremely challenging. In recent years, these questions are often used in examination questions across the country. It is worthwhile for the students to seriously study and study in peacetime learning. The following selection of several intermediate examination questions is to be explored with the students. And to understand the problem-solving law of this kind of problem. Example 1 (Jilin, 2004) Xiao Wang’s home renovation, he went to the store to buy lights, the existing 100-watt incandescent lamp and 40-watt energy-saving lamp in the shop counter, their single