Gaokao Math Practice Question
若实数 $x, y$ 满足约束条件 $\left\{\begin{array}{l}x-2 \geq 0, \\ 2 x+y-7 \leq 0, \text { 则 } z=3 x+4 y \text { 的最大值是 }(\qquad) \\ x-y-2 \leq 0,\end{array}\right.$
- A.20
- B.18
- C.13
- D.6
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