| ( | 1 | ÷ | 7 | ) | ( | x | − | 1 | ) | = | ( | 1 | ÷ | 7 | ) | ( | ( | 1 | − | ( | 1 | ÷ | 7 | ) | ) | ( | x | − | 1 | ) | − | 2 | ) | + | 2 |
| 方程左边 = | 1 | ÷ | 7 | × | ( | x | − | 1 | ) |
| = | 1 7 | ( | x | − | 1 | ) |
| = | 1 7 | x | − | 1 7 | × | 1 |
| = | 1 7 | x | − | 1 7 |
1 7 | x | − | 1 7 | = | ( | 1 | ÷ | 7 | ) | ( | ( | 1 | − | ( | 1 | ÷ | 7 | ) | ) | ( | x | − | 1 | ) | − | 2 | ) | + | 2 |
| 方程右边 = | 1 | ÷ | 7 | × | ( | ( | 1 | − | ( | 1 | ÷ | 7 | ) | ) | ( | x | − | 1 | ) | − | 2 | ) | + | 2 |
| = | 1 7 | ( | ( | 1 | − | ( | 1 | ÷ | 7 | ) | ) | ( | x | − | 1 | ) | − | 2 | ) | + | 2 |
| = | 1 7 | ( | 1 | − | ( | 1 | ÷ | 7 | ) | ) | ( | x | − | 1 | ) | − | 1 7 | × | 2 | + | 2 |
| = | 1 7 | ( | 1 | − | ( | 1 | ÷ | 7 | ) | ) | ( | x | − | 1 | ) | − | 2 7 | + | 2 |
| = | 1 7 | ( | 1 | − | ( | 1 | ÷ | 7 | ) | ) | ( | x | − | 1 | ) | + | 12 7 |
| = | 1 7 | × | 1 | ( | x | − | 1 | ) | − | 1 7 | ( | 1 | ÷ | 7 | ) | ( | x | − | 1 | ) | + | 12 7 |
| = | 1 7 | ( | x | − | 1 | ) | − | 1 7 | ( | 1 | ÷ | 7 | ) | ( | x | − | 1 | ) | + | 12 7 |
| = | 1 7 | x | − | 1 7 | × | 1 | − | 1 7 | ( | 1 | ÷ | 7 | ) | ( | x | − | 1 | ) | + | 12 7 |
| = | 1 7 | x | − | 1 7 | − | 1 7 | ( | 1 | ÷ | 7 | ) | ( | x | − | 1 | ) | + | 12 7 |
| = | 1 7 | x | + | 11 7 | − | 1 7 | ( | 1 | ÷ | 7 | ) | ( | x | − | 1 | ) |
| = | 1 7 | x | + | 11 7 | − | 1 7 | × | 1 | ÷ | 7 | × | ( | x | − | 1 | ) |
| = | 1 7 | x | + | 11 7 | − | 1 49 | ( | x | − | 1 | ) |
| = | 1 7 | x | + | 11 7 | − | 1 49 | x | + | 1 49 | × | 1 |
| = | 1 7 | x | + | 11 7 | − | 1 49 | x | + | 1 49 |
| = | 6 49 | x | + | 78 49 |
1 7 | x | − | 1 7 | = | 6 49 | x | + | 78 49 |
1 7 | x | − | 6 49 | x | = | 78 49 | + | 1 7 |
1 49 | x | = | 78 49 | + | 1 7 |
1 49 | x | = | 85 49 |
| x | = | 85 49 | ÷ | 1 49 |
| = | 85 49 | × | 49 |
| = | 85 | × | 1 |
| x | = | 85 |