Mathematics, 28.07.2019 10:00 xcrysttallx

What is the solution to the system of equations? {2x + y - z = 7 {-x - 2y - 2z = -9 {x + 3y - 3z = 6 a: (3, 2, 1) b: (3, 2, -1) c: (-3, 2, 1) d: (3, -2, 1)

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