消元法(代入消元法或加减消元法)是二元一次方程组的重要解法,也是学生必须要理解掌握的解法.但对于一些系数复杂的或特殊的二元一次方程组,用消元法求解运算量较大,若我们换一个思路去求解,也许会事半功倍,下面结合具体例子,介绍几种二元一次方程组的另类解法,希望对读者有所帮助. Elimination method (substitution elimination method or addition and subtraction elimination method) is an important solution of binary linear equations, but also students must understand the master solution, but for some complex coefficients or special bivariate equations with Eliminating the element method to solve the large amount of computation, if we change the way to solve, may be more effective, the following combination of specific examples, introduce several alternative equations of binary equations, I hope to help the reader.