二元一次方程组解法详解：5x+2y=26与2x-y=5解题步骤教学

在黑板上画出下列二元一次方程组及其相应的解法步骤：

5x + 2y = 26；

2x - y = 5。

Draw the following system of linear equations and its corresponding solution steps on the blackboard: 5x + 2y = 26; 2x - y = 5.