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Maximize z = 3 x 1 - x 2 , su...

Maximize ` z = 3 x _ 1 - x _ 2 `, subject to
` 2x _ 1 + x _ 2 ge 2, x _ 1 + 3 x _ 2 le 2, x _ 2 le 2, x _ 1 ge 0 , x _ 2 ge 0 `

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`z_("max")=6`, when `x_(1)=2` and `x_(2)=0`.
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