| 1 | ÷ | ( | 6 | × | 7 | × | 8 | ) | − | 1 | ÷ | ( | 7 | × | 8 | × | 9 | ) | = | 1 | ÷ | ( | 7 | × | 8 | × | 9 | ) | × | X |
| 方程两边同时乘以: | ( | 6 | × | 7 | × | 8 | ) | , | ( | 7 | × | 8 | × | 9 | ) |
| 1 | ( | 7 | × | 8 | × | 9 | ) | − | 1 | ÷ | ( | 7 | × | 8 | × | 9 | ) | × | ( | 6 | × | 7 | × | 8 | ) | ( | 7 | × | 8 | × | 9 | ) | = | 1 | X | ( | 6 | × | 7 | × | 8 | ) |
| 1 | × | 7 | × | 8 | × | 9 | − | 1 | ÷ | ( | 7 | × | 8 | × | 9 | ) | × | ( | 6 | × | 7 | × | 8 | ) | ( | 7 | × | 8 | × | 9 | ) | = | 1 | X | ( | 6 | × | 7 | × | 8 | ) |
| 1 | × | 7 | × | 8 | × | 9 | − | 1 | ÷ | ( | 7 | × | 8 | × | 9 | ) | × | ( | 6 | × | 7 | × | 8 | ) | ( | 7 | × | 8 | × | 9 | ) | = | 1 | X | × | 6 | × | 7 | × | 8 |
| 504 | − | 1 | ÷ | ( | 7 | × | 8 | × | 9 | ) | × | ( | 6 | × | 7 | × | 8 | ) | ( | 7 | × | 8 | × | 9 | ) | = | 336 | X |
| 方程两边同时乘以: | ( | 7 | × | 8 | × | 9 | ) |
| 504 | ( | 7 | × | 8 | × | 9 | ) | − | 1 | ( | 6 | × | 7 | × | 8 | ) | ( | 7 | × | 8 | × | 9 | ) | = | 336 | X | ( | 7 | × | 8 | × | 9 | ) |
| 504 | × | 7 | × | 8 | × | 9 | − | 1 | ( | 6 | × | 7 | × | 8 | ) | ( | 7 | × | 8 | × | 9 | ) | = | 336 | X | ( | 7 | × | 8 | × | 9 | ) |
| 504 | × | 7 | × | 8 | × | 9 | − | 1 | ( | 6 | × | 7 | × | 8 | ) | ( | 7 | × | 8 | × | 9 | ) | = | 336 | X | × | 7 | × | 8 | × | 9 |
| 254016 | − | 1 | ( | 6 | × | 7 | × | 8 | ) | ( | 7 | × | 8 | × | 9 | ) | = | 169344 | X |
| 254016 | − | 1 | × | 6 | × | 7 | × | 8 | ( | 7 | × | 8 | × | 9 | ) | = | 169344 | X |
| 254016 | − | 336 | ( | 7 | × | 8 | × | 9 | ) | = | 169344 | X |
| 254016 | − | 336 | × | 7 | × | 8 | × | 9 | = | 169344 | X |
| 254016 | − | 169344 | = | 169344 | X |
| 84672 | = | 169344 | X |
| - | 169344 | X | = | - | 84672 |
| 84672 | = | 169344 | X |
| 169344 | X | = | 84672 |
| X | = | 84672 | ÷ | 169344 |
| = | 84672 | × | 1 169344 |
| = | 1 | × | 1 2 |
| X | = | 1 2 |
| X | = | 0.5 |