近年来中考频频出现方案设计题,要求人们依据生产生活的实际需要,设计或计算出解决问题的方案,并对方案作出判断与选择,以达到节约成本、提高效益、经济实用的目的,题中较多地出现不等式(组)和方程(组),把方程和不等式巧妙地结合在一起可以解决题目条件中既有不等式又有等量关系的实际问题,解答的 In recent years, there are frequent program design questions in senior high school entrance examination, requiring people to design or calculate the solution to the problem according to the actual needs of production and life, and to make judgments and choices on the scheme so as to achieve the goal of cost saving, efficiency improvement and economy practicality. The more inequalities (groups) and equations (groups) appear, the clever combination of equations and inequalities can solve the practical problems of inequality and equivalence in the condition of the problem