| 100 | X | ( | 1 | − | X | ) | ( | 1 | − | X | ) | = | 36 |
| 方程左边 = | 100 | X | × | 1 | ( | 1 | − | X | ) | − | 100 | X | X | ( | 1 | − | X | ) |
| = | 100 | X | ( | 1 | − | X | ) | − | 100 | X | X | ( | 1 | − | X | ) |
| = | 100 | X | × | 1 | − | 100 | X | X | − | 100 | X | X | ( | 1 | − | X | ) |
| = | 100 | X | − | 100 | X | X | − | 100 | X | X | ( | 1 | − | X | ) |
| = | 100 | X | − | 100 | X | X | − | 100 | X | X | × | 1 | + | 100 | X | X |
| = | 100 | X | − | 100 | X | X | − | 100 | X | X | + | 100 | X | X | X |
| 100 | X | − | 100 | X | X | − | 100 | X | X | + | 100 | X | X | X | = | 36 |