| ( | 9 | X | + | 6 | ) | ( | 60 | − | 59 | X | ) | = | 1008 |
| 方程左边 = | 9 | X | ( | 60 | − | 59 | X | ) | + | 6 | ( | 60 | − | 59 | X | ) |
| = | 9 | X | × | 60 | − | 9 | X | × | 59 | X | + | 6 | ( | 60 | − | 59 | X | ) |
| = | 540 | X | − | 531 | X | X | + | 6 | ( | 60 | − | 59 | X | ) |
| = | 540 | X | − | 531 | X | X | + | 6 | × | 60 | − | 6 | × | 59 | X |
| = | 540 | X | − | 531 | X | X | + | 360 | − | 354 | X |
| = | 186 | X | − | 531 | X | X | + | 360 |
| 186 | X | − | 531 | X | X | + | 360 | = | 1008 |