| 27 | − | x | − | 2 | − | ( | 27 | − | x | − | 2 | ) | × | 9 50 | = | 19 |
| 方程左边 = | 25 | − | x | − | ( | 27 | − | x | − | 2 | ) | × | 9 50 |
| 25 | − | x | − | ( | 27 | − | x | − | 2 | ) | × | 9 50 | = | 19 |
| 方程左边 = | 25 | − | x | − | 27 | × | 9 50 | + | x | × | 9 50 | + | 2 | × | 9 50 |
| = | 25 | − | x | − | 243 50 | + | x | × | 9 50 | + | 9 25 |
| = | 41 2 | − | 41 50 | x |
41 2 | − | 41 50 | x | = | 19 |
| - | 41 50 | x | = | 19 | − | 41 2 |
| - | 41 50 | x | = | - | 3 2 |
3 2 | = | 41 50 | x |
41 50 | x | = | 3 2 |
| x | = | 3 2 | ÷ | 41 50 |
| = | 3 2 | × | 50 41 |
| = | 3 | × | 25 41 |
| x | = | 75 41 |
| x | = | 1.829268 |