| ( | 1 | − | 1 10 | ) | x | + | ( | - | 1 | − | 1 10 | ) | ( | 1 | − | x | ) | = | 0 |
| 方程左边 = | 1 | x | − | 1 10 | x | + | ( | - | 1 | − | 1 10 | ) | ( | 1 | − | x | ) |
| = | 9 10 | x | + | ( | - | 1 | − | 1 10 | ) | ( | 1 | − | x | ) |
| = | 9 10 | x | − | 1 | ( | 1 | − | x | ) | − | 1 10 | ( | 1 | − | x | ) |
| = | 9 10 | x | − | 1 | × | 1 | + | 1 | x | − | 1 10 | ( | 1 | − | x | ) |
| = | 9 10 | x | − | 1 | + | 1 | x | − | 1 10 | ( | 1 | − | x | ) |
| = | 19 10 | x | − | 1 | − | 1 10 | ( | 1 | − | x | ) |
| = | 19 10 | x | − | 1 | − | 1 10 | × | 1 | + | 1 10 | x |
| = | 19 10 | x | − | 1 | − | 1 10 | + | 1 10 | x |
| = | 2 | x | − | 11 10 |
| 2 | x | − | 11 10 | = | 0 |
| 2 | x | = | 0 | + | 11 10 |
| 2 | x | = | 11 10 |
| x | = | 11 10 | ÷ | 2 |
| = | 11 10 | × | 1 2 |
| x | = | 11 20 |
| x | = | 0.55 |