Maximise Z =  3x + 4y
subject to the constraints : x + y ≤ 4, x  ≥  0, y ≥ 0 Fig 12 6
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MATHEMATICS
2 Minimise Z = – 3x + 4 y
subject to x + 2y ≤ 8, 3x + 2y ≤ 12,  x  ≥  0, y ≥ 0