已知实数x,y满足x-y+2≥0,x+y-4≥0,2x-y-5≤0,则3x+2y的最大值为

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已知实数x,y满足x-y+2≥0,x+y-4≥0,2x-y-5≤0,则3x+2y的最大值为已知实数x,y满足x-y+2≥0,x+y-4≥0,2x-y-5≤0,则3x+2y的最大值为已知实数x,y满足x

已知实数x,y满足x-y+2≥0,x+y-4≥0,2x-y-5≤0,则3x+2y的最大值为
已知实数x,y满足x-y+2≥0,x+y-4≥0,2x-y-5≤0,则3x+2y的最大值为

已知实数x,y满足x-y+2≥0,x+y-4≥0,2x-y-5≤0,则3x+2y的最大值为
A:x-y+2≥0→2x-2y+4≥0
B：x+y-4≥0→2x+2y-8≥0
C：2x-y-5≤0→-2x+y+5≥0
A+B→X≥1
B-C→X≥3
A+C→X≤7
总上：3≤X≤7
B-A→Y≥3
A+C→Y≤9
B+C→Y≥1
总上：3≤Y≤9
所以3X+2Y最大为3×7+2×9=39

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