Contoh : 1 2 4 2 1. X = −1 3 1 3 1 2 3 0 2. X = 2 3 −1 4 Penyelesaian : 1 2 4 2 1. X = 1 2 3 0 −1 3 1 3 2. X = 2 3 −1 4 X = 1 3 −2 4 2 X = 3 0 . 1 0 3 −(−2) 1 1 1 3 −1 4 3 − 4 1 10 0 X = 3 0 −3 2 X = 5 5 5 −1 4 2 −1 2 0 X = −9 6 X = 11 −6 1 1