解二元一次方程组的主要方法是消元法,对于一些分数系数或小数系数的二元一次方程组,如果直接用消元法去解就有点复杂了．我们通常根据二元一次方程组的构成情况将分数系数或小数系数化为整数系数,然后再用消元法解方程组．我们以课本七年级下册“二元一次方程组”中的习题为例说明这类题的解法． The primary method for solving binary equations is the elimination method. For some binary equations with fractional coefficients or decimal coefficients, it is somewhat complicated to directly use the elimination method. We usually convert the fractional coefficients or fractional coefficients into integer coefficients according to the composition of the binary first-order equations, and then use the elimination method to solve the equations. We illustrate the solution to this type of problem by taking the exercises in the second grade textbook of the seventh grade of the textbook as an example.