1 . সমীকরণমালাঃ x + 2y - z = 5; 2x + 3y + z = 11; 3x - y + 3z = 7
- A. x = 2, y = -2, z = 1
- B. x = 2, y = 2, z = 1
- C. x = 1, y = 4, z = 4
- D. x = 1, y = 2, z = 0
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