在学习方程组之前,我们已经可以通过算术方法或列一元一次方程来解决很多实际问题,那么为什么还要学习二元一次方程组?它们之间的地位和关系究竟怎样呢?一、算术方法巧妙,但曲高和寡雉兔例各1几何今?有雉兔同笼,上有三十五头,下有九十四足,问分析这道例题同学们可能早已耳熟能 Before learning the equations, we can already solve many practical problems by means of arithmetic methods or single-ary equations. So why should we learn binary equations? What is the status and relationship between them? First, the arithmetic method is ingenious. However, in the case of the pedigree and the filial piety, each rabbit has a rabbit in the same cage. There are thirty-five heads and there are ninety-four feet. Ask students to analyze this example. The students may already be familiar with it.