1 10 | = | 2 25 | + | 1 | ÷ | 11 20 | × | ( | 1 | − | X | ) | ÷ | 1 | − | 2 25 | + | 1 | ÷ | 11 20 | × | ( | 1 | − | X | ) |
| 方程右边 = | 2 25 | + | 20 11 | ( | 1 | − | X | ) | − | 2 25 | + | 20 11 | ( | 1 | − | X | ) |
| = | 0 | + | 20 11 | ( | 1 | − | X | ) | + | 20 11 | ( | 1 | − | X | ) |
1 10 | = | 0 | + | 20 11 | ( | 1 | − | X | ) | + | 20 11 | ( | 1 | − | X | ) |
| 方程右边 = | 0 | + | 20 11 | × | 1 | − | 20 11 | X | + | 20 11 | ( | 1 | − | X | ) |
| = | 0 | + | 20 11 | − | 20 11 | X | + | 20 11 | ( | 1 | − | X | ) |
| = | 20 11 | − | 20 11 | X | + | 20 11 | ( | 1 | − | X | ) |
| = | 20 11 | − | 20 11 | X | + | 20 11 | × | 1 | − | 20 11 | X |
| = | 20 11 | − | 20 11 | X | + | 20 11 | − | 20 11 | X |
| = | 40 11 | − | 40 11 | X |
1 10 | = | 40 11 | − | 40 11 | X |
40 11 | X | = | 40 11 | − | 1 10 |
40 11 | X | = | 389 110 |
| X | = | 389 110 | ÷ | 40 11 |
| = | 389 110 | × | 11 40 |
| = | 389 10 | × | 1 40 |
| X | = | 389 400 |
| X | = | 0.9725 |