二元一次方程组,作为初中代数的重点内容之一,不仅因为它是“学习线性方程组和二元二次方程组的基础,可以进一步解决一次函数、解析几何中的问题以及科技、日常生活中的问题”(人教版《代数》第一册(下)教师教学用书p2语),更因为通过它的学习,可以使学生初步了解代数中把“未知”转化为“已知”这一重要的数学思想,可以培养学生观察、分析、运算以及解决实际问题的能力, The binary system of primary equations, as one of the key contents of the algebra of junior middle school, not only because it is the basis for the study of linear equations and binary quadratic equations, it can further solve the problem of primary functions, analytical geometry, and technology, daily life. “The problem in the middle school” (P2 in the “educational algebra” in the first volume (under) teacher’s teaching book), but also because of its learning, students can make a preliminary understanding of the “unknown” in algebra into “known” this Important mathematical ideas can develop students’ ability to observe, analyze, calculate, and solve practical problems.