| ( | 1 | ÷ | x | + | ( | 1 | ÷ | 12 | − | x | ) | ) | × | 9 | + | 1 | ÷ | x | × | 5 | = | 1 |
| 方程两边同时乘以: | x |
| ( | 1 | ÷ | x | + | ( | 1 | ÷ | 12 | − | x | ) | ) | × | 9 | x | + | 1 | × | 5 | = | 1 | x |
| 1 | ÷ | x | × | 9 | x | + | ( | 1 | ÷ | 12 | − | x | ) | × | 9 | x | + | 1 | × | 5 | = | 1 | x |
| 9 | ÷ | x | × | x | + | ( | 1 | ÷ | 12 | − | x | ) | × | 9 | x | + | 5 | = | 1 | x |
| 9 | ÷ | 1 | × | 1 | + | 1 | ÷ | 12 | × | 9 | x | − | x | × | 9 | x | + | 5 | = | 1 | x |
| 9 | + | 3 4 | x | − | x | × | 9 | x | + | 5 | = | 1 | x |
| 14 | + | 3 4 | x | − | x | × | 9 | x | = | 1 | x |