| ( | 11303 20 | − | x | ) | ( | - | 1032203209 1000000000 | ) | ( | 14113 20 | − | x | ) | × | 81 50 | = | 1553181469 1000000 |
| 方程左边 = | 11303 20 | ( | - | 1032203209 1000000000 | ) | ( | 14113 20 | − | x | ) | × | 81 50 | − | x | ( | - | 1032203209 1000000000 | ) | ( | 14113 20 | − | x | ) | × | 81 50 |
| = | 915543 1000 | ( | - | 1032203209 1000000000 | ) | ( | 14113 20 | − | x | ) | − | x | ( | - | 1032203209 1000000000 | ) | ( | 14113 20 | − | x | ) | × | 81 50 |
| = | - | 915543 1000 | × | 1032203209 1000000000 | ( | 14113 20 | − | x | ) | − | x | ( | - | 1032203209 1000000000 | ) | ( | 14113 20 | − | x | ) | × | 81 50 |