Gaokao Math Practice Question
设变量 $x, y$ 满足约束条件: $\left\{\begin{array}{l}y \geqslant x \\ x+2 y \leqslant 2 \\ x \geqslant-2\end{array}\right.$, 则 $z=x-3 y$ 的最小值($\qquad$)
- A.-2
- B.-4
- C.-6
- D.-8
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