方程与方程组是初中数学的重要内容,是历年来中考命题的重点和热点.有些问题从形式上看似乎与二元一次方程组无关,但可通过构造二元一次方程组求解,现举例说明.一、根据二元一次方程的定义构造二元一次方程组 Equations and equations are an important part of junior high school mathematics and are the focus and hotspot of the senior high school entrance examination papers over the years. Some of the questions seem to be formally irrelevant to binary linear equations, but can be solved by constructing a binary one-equation system. First, according to the definition of the bivariate equation to construct a binary system of equations