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不等式在确定范围、制定最佳方案等方面有较为广泛的应用,已成为近几年中考命题的热点。下面结合部本分地区的几例中考试题分析如下,供同学们参考。一、确定数量例1(2012·福建福州)某次知识竞赛共有20道题,每一题答对得5分,答错或不答都扣3分。(1)小明考了68分,那么小明答对了多少道题?(2)小亮获得二等奖(70分～90分),请你算算小亮答对了几道题?解析:对于(1),设小明答对了x道题,则可列出一元一
Inequality in the determination of the scope of formulation of the best programs have a more extensive application, has become a hot topic in the last few years in the test. The following part of the sub-region with several exam questions as follows, for students to reference. First, determine the number of Example 1 (2012 Fuzhou, Fujian) a knowledge contest a total of 20 questions, each question answered 5 points, wrong answer or do not answer all deducted 3 points. (2) Xiaoliang won the second prize (70 points to 90 points), you calculate the small light answer a few questions? Analysis: For () Xiao Ming test 68 points, then Xiaoming answer the number of questions? 1), set Xiaoming answer x questions, you can list a dollar