该文通过引入三元一次方程机制，改进了“双参数假说”，尝试提出了“等级参数假说”。
By improving Ais hypothesis this paper brought in three-variable linear equation and put forth the hypothesis of .
作者根据钢铁酸洗原理、膜分离工艺研究结果和工程实践经验，提出了多元一次方程求解法。
Based on pickling principle, research results of membrane separation process and experience of engineering practice, the author developed a method of solving equations in multiple variables.
华师版实验教材《二元一次方程组》这章的主要特点有：编排紧凑、语言表达浅显易于理解；
Chinese teacher version of the main advantages of experimental materials include: a compact layout, language features to express interests of the students;
从前求一元一次方程和一元二次方程的根，要求输入方程的系数，数据间逗号或空格分隔，输出方程的根。
Once upon, slover the root equation of a degree and equation of two degree that need input coefficient of equation, data separate need comma or space, output the root equation.
FORTRAN77编制的求一元一次方程和一元二次方程的根，实现了输入方程字符串，输出方程的根。
The program use The FORTRAN77 language slover the root equation of a degree and equation of two degree, It is succeed that input string of equation, output the root equation.
FORTRAN77编制的求一元一次方程和一元二次方程的根，实现了输入方程字符串，输出方程的根。
The program use The FORTRAN77 language slover the root equation of a degree and equation of two degree, It is succeed that input string of equation, output the root equation.
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