“微信扫一扫”进入题库练习及模拟考试
初中数学七年级下册（573题）
{x - y = 4} \\
{2x + y = 5}
\end{array}} \right.\)
知识点：第八章 二元一次方程组
参考答案：\(\left\{ {\begin{array}{*{20}{l}}
{x = 3} \\
{y = - 1}
\end{array}} \right.\)
“微信扫一扫”进入题库练习及模拟考试
{x - y = 4} \\
{2x + y = 5}
\end{array}} \right.\)
参考答案：\(\left\{ {\begin{array}{*{20}{l}}
{x = 3} \\
{y = - 1}
\end{array}} \right.\)