16 100 | = | 13 100 | − | 1 100 | × | 8 | ( | 1 | − | X | ) |
| 方程右边 = | 13 100 | − | 2 25 | ( | 1 | − | X | ) |
16 100 | = | 13 100 | − | 2 25 | ( | 1 | − | X | ) |
| 方程右边 = | 13 100 | − | 2 25 | × | 1 | + | 2 25 | X |
| = | 13 100 | − | 2 25 | + | 2 25 | X |
| = | 1 20 | + | 2 25 | X |
16 100 | = | 1 20 | + | 2 25 | X |
| - | 2 25 | X | = | 1 20 | − | 16 100 |
| - | 2 25 | X | = | - | 11 100 |
11 100 | = | 2 25 | X |
2 25 | X | = | 11 100 |
| X | = | 11 100 | ÷ | 2 25 |
| = | 11 100 | × | 25 2 |
| = | 11 4 | × | 1 2 |
| X | = | 11 8 |
| X | = | 1.375 |