二元一次方程组与不等式(组)结合的题目,是现在七年级学生学习的难点.也是近几年来中考中常出现的题目,很多学生不知从何入手,解决这类题目的关键是如何根据已知条件运用转化的思想,构造新的不等式(组)或方程组再求解.针对这种情况现举例如下.一、由方程组构造不等式求解例1m为 The combination of the dual-primary equations and the inequalities (groups) is now a difficult point for students in grade seven. It is also a topic that often appears in the middle school exams in recent years. Many students do not know where to start, and the key to solving such problems is based on Knowing conditions use the idea of ​​transformation to construct new inequalities (groups) or equations and solve them again. For this case, the following example is given below. First, an equation inequality is used to solve the problem. Example 1m is