The first constraint is

- x + y + z 40.

- x + y + z + s = 40.

The next constraint is

- 2x + y - z 10,

- 2x + y - z - t = 10.

The last constraint is

- - y + z 10,

- - y + z - u = 10.

Finally, the objective is

- p = 2x + 3y + z.

- -2x - 3y - z + p = 0.

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