运用方程模型可解决生活中的不少问题,这些问题都涉及等量关系.其实,在日常生产生活中,不等关系更为普遍,利润的优化、方案的设计等方面都有不等关系.研究不等关系的数学模型———一元一次不等式(组)就是处理后者的一个利器.在具体运用时,它既可单独使用,也可与方程等多种知识配合使用. The use of the equation model can solve many problems in life. These problems involve equal-volume relations. In fact, in the daily production and life, the unequal relations are more common, the optimization of profits, the design of programs and other aspects are not equal. The mathematical model of studying inequality—the unitary inequalities (group) is a tool to deal with the latter. When it is used in practice, it can be used alone or in combination with equations and other knowledge.