Which ordered triple represents all of the solutions to the system of equations shown below?

2x - 2y - z = 6

-x + y + 3z = - 3

3x - 3y + 2z = 9

a) (-x, x + 2, 0)

b) (x, x - 3, 0)

c) (x + 2, x, 0)

d) (0, y, y + 4)

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