题目解方程组和不等式组(1)(1)(1)解方程{2x−y=6①x+2y=−2②\left\{\begin{array}{l}2x-y=6①\\ x+2y=-2②\end{array}\right.{2x−y=6①x+2y=−2②；(2)(2)(2)解不等式组{2x＞5x−1①4x+23≥x②\left\{\begin{array}{c}2x＞5x-1①\\ \frac{4x+2}{3}≥x②\end{array}\right.{2x＞5x−1①34x+2≥x②知识点：解二元一次方程组——代入消元法章节：方程与不等式 / 二元一次方程组
