| 1 | ÷ | 16 | = | ( | 1 | − | x | ) | ( | 1 | − | 19 | x | ) | ( | 1 | − | 20 | x | ) |
| 方程左边 = | 1 16 |
1 16 | = | ( | 1 | − | x | ) | ( | 1 | − | 19 | x | ) | ( | 1 | − | 20 | x | ) |
| 方程右边 = | 1 | ( | 1 | − | 19 | x | ) | ( | 1 | − | 20 | x | ) | − | x | ( | 1 | − | 19 | x | ) | ( | 1 | − | 20 | x | ) |
| = | 1 | × | 1 | ( | 1 | − | 20 | x | ) | − | 1 | × | 19 | x | ( | 1 | − | 20 | x | ) | − | x | ( | 1 | − | 19 | x | ) | ( | 1 | − | 20 | x | ) |
| = | 1 | ( | 1 | − | 20 | x | ) | − | 19 | x | ( | 1 | − | 20 | x | ) | − | x | ( | 1 | − | 19 | x | ) | ( | 1 | − | 20 | x | ) |
| = | 1 | × | 1 | − | 1 | × | 20 | x | − | 19 | x | ( | 1 | − | 20 | x | ) | − | x | ( | 1 | − | 19 | x | ) | ( | 1 | − | 20 | x | ) |
| = | 1 | − | 20 | x | − | 19 | x | ( | 1 | − | 20 | x | ) | − | x | ( | 1 | − | 19 | x | ) | ( | 1 | − | 20 | x | ) |
| = | 1 | − | 20 | x | − | 19 | x | × | 1 | + | 19 | x | × | 20 | x | − | x | ( | 1 | − | 19 | x | ) |
| = | 1 | − | 20 | x | − | 19 | x | + | 380 | x | x | − | x | ( | 1 | − | 19 | x | ) | ( | 1 | − | 20 | x | ) |
| = | 1 | − | 39 | x | + | 380 | x | x | − | x | ( | 1 | − | 19 | x | ) | ( | 1 | − | 20 | x | ) |
| = | 1 | − | 39 | x | + | 380 | x | x | − | x | × | 1 | ( | 1 | − | 20 | x | ) | + | x | × | 19 | x |
| = | 1 | − | 39 | x | + | 380 | x | x | − | x | × | 1 | × | 1 | + | x | × | 1 | × | 20 |
| = | 1 | − | 39 | x | + | 380 | x | x | − | x | × | 1 | + | x | × | 20 | x | + | x |
| = | 1 | − | 40 | x | + | 380 | x | x | + | x | × | 20 | x | + | x | × | 19 | x |
| = | 1 | − | 40 | x | + | 380 | x | x | + | x | × | 20 | x | + | x | × | 19 | x |
| = | 1 | − | 40 | x | + | 380 | x | x | + | x | × | 20 | x | + | x | × | 19 | x |
1 16 | = | 1 | − | 40 | x | + | 380 | x | x | + | x | × | 20 | x | + | x | × | 19 | x |