应用带入消元方法消去其中一个未知数,转化成学生所熟悉的一元一次方程。消元思想将未知数个数从多个转少个,一步一步解决,让问题可以得到简化,这也是一种极为重要且有用的思想。那么,什么是二元一次方程?简单来说是以下几个方面:一是含有多个未知数实际问题背景,经历分析数量关系,设未知数并列方程组,在解方程组检验结果的一个过程,体会到方程组是对现实世界中含有多个未知数问题数学模型的一种刻画。二是二元一次方程组、有关概念,能设两个未知数并列方程 One of the unknowns, which is brought into the elimination method, is eliminated and transformed into a one-time equation familiar to students. It is also an extremely important and useful idea that the thought of eliminating yuan changes the number of unknowns from a few to a few and solving them step by step so that the problem can be simplified. So, what is a binary equation? In simple terms is the following aspects: First, with a number of unknowns the background of the actual problem, through the analysis of the number of relations, set unknowns parallel equations, equations in the test results of a process, experience To the system of equations is a depiction of a mathematical model that contains many unknowns in the real world. Second, a binary system of equations, the concept can be set up two unknowns parallel equations