学习知识的目的在于应用．现以一道经典的“最优化方案设计”题为例,说明一元一次不等式知识的应用．例题(2006年·天门市)某地为促进特种水产养殖业的发展,决定对甲鱼和黄鳝的养殖提供政府补贴．该地某农户在改建的10个1亩大小的水池里分别养殖甲鱼和黄鳝,因资金有限,投入不能超过14万元,并希望获得不低于10．8万元的年收益．相关信息如下表．(收益=毛利润-成本+政府补贴) The purpose of learning knowledge is to apply. A classic “Optimum Design” problem is taken as an example to illustrate the application of one-dimensional inequality knowledge. Example (2006 Tianmen City) In order to promote the development of special aquaculture industry, it was decided to provide government subsidy for the breeding of soft-shelled turtle and yellow bream. A certain farmer in the area farmed turtles and astragalus in 10 remodeled 1 acre ponds. Due to limited funds, the investment cannot exceed 140,000 yuan, and he hopes to obtain an annual income of no less than 108,000 yuan. Related information is shown in the table below. (Proceeds = Gross Profit - Cost + Government Allowance)