[7, 2, 3] + s·[4, -2, 0] + t·[-3, 2, 1] = [13, 0, 5] --> s = 3 ∧ t = 2
[8, 9, 1] + s·[6, 2, 3] + t·[-7, -4, 1] = [13, 0, 5] --> keine Lösung
[3, 0, 3] + s·[7, 4, 2] + t·[-3, -2, 1] = [13, 0, 5] --> keine Lösung
[7, 2, 3] + s·[4, -2, 0] + t·[-3, 2, 1] = [-6, 8, 2] --> s = -4 ∧ t = -1
[8, 9, 1] + s·[6, 2, 3] + t·[-7, -4, 1] = [-6, 8, 2] --> keine Lösung
[3, 0, 3] + s·[7, 4, 2] + t·[-3, -2, 1] = [-6, 8, 2] --> keine Lösung