| 108 | ( | 1 | − | x | ) | × | 800 | ( | 1 | + | 1 | ÷ | 3 | × | x | ) | = | 106 | ( | 1 | − | 1 | ÷ | 2 | × | x | ) | × | 1440 | − | 48000 |
| 方程左边 = | 86400 | ( | 1 | − | x | ) | ( | 1 | + | 1 | ÷ | 3 | × | x | ) |
| 86400 | ( | 1 | − | x | ) | ( | 1 | + | 1 | ÷ | 3 | × | x | ) | = | 106 | ( | 1 | − | 1 | ÷ | 2 | × | x | ) | × | 1440 | − | 48000 |
| 方程左边 = | 86400 | × | 1 | ( | 1 | + | 1 | ÷ | 3 | × | x | ) | − | 86400 | x | ( | 1 | + | 1 | ÷ | 3 | × | x | ) |
| = | 86400 | ( | 1 | + | 1 | ÷ | 3 | × | x | ) | − | 86400 | x | ( | 1 | + | 1 | ÷ | 3 | × | x | ) |
| = | 86400 | × | 1 | + | 86400 | × | 1 | ÷ | 3 | × | x | − | 86400 | x | ( | 1 | + | 1 | ÷ | 3 | × | x | ) |
| = | 86400 | + | 28800 | x | − | 86400 | x | ( | 1 | + | 1 | ÷ | 3 | × | x | ) |
| = | 86400 | + | 28800 | x | − | 86400 | x | × | 1 | − | 86400 | x | × | 1 | ÷ | 3 | × | x |
| = | 86400 | + | 28800 | x | − | 86400 | x | − | 28800 | x | x |
| = | 86400 | − | 57600 | x | − | 28800 | x | x |
| 86400 | − | 57600 | x | − | 28800 | x | x | = | 106 | ( | 1 | − | 1 | ÷ | 2 | × | x | ) | × | 1440 | − | 48000 |
| 方程右边 = | 152640 | ( | 1 | − | 1 | ÷ | 2 | × | x | ) | − | 48000 |
| 86400 | − | 57600 | x | − | 28800 | x | x | = | 152640 | ( | 1 | − | 1 | ÷ | 2 | × | x | ) | − | 48000 |
| 方程右边 = | 152640 | × | 1 | − | 152640 | × | 1 | ÷ | 2 | × | x | − | 48000 |
| = | 152640 | − | 76320 | x | − | 48000 |
| = | 104640 | − | 76320 | x |
| 86400 | − | 57600 | x | − | 28800 | x | x | = | 104640 | − | 76320 | x |