| ( | 2 | ÷ | 15 | × | x | + | 2 | ÷ | 15 | × | x | + | 6 | ) | ÷ | ( | x | − | ( | 2 | ÷ | 15 | × | x | + | 2 | ÷ | 15 | × | x | + | 6 | ) | ) | = | 5 | ÷ | 6 |
| 方程两边同时乘以: | ( | x | − | ( | 2 | ÷ | 15 | × | x | + | 2 | ÷ | 15 | × | x | + | 6 | ) | ) |
| ( | 2 | ÷ | 15 | × | x | + | 2 | ÷ | 15 | × | x | + | 6 | ) | = | 5 | ÷ | 6 | × | ( | x | − | ( | 2 | ÷ | 15 | × | x | + | 2 | ÷ | 15 | × | x | + | 6 | ) | ) |
| 2 | ÷ | 15 | × | x | + | 2 | ÷ | 15 | × | x | + | 6 | = | 5 | ÷ | 6 | × | ( | x | − | ( | 2 | ÷ | 15 | × | x | + | 2 | ÷ | 15 | × | x | + | 6 | ) | ) |
| 2 | ÷ | 15 | × | x | + | 2 | ÷ | 15 | × | x | + | 6 | = | 5 | ÷ | 6 | × | x | − | 5 | ÷ | 6 | × | ( | 2 | ÷ | 15 | × | x | + | 2 | ÷ | 15 | × | x | + | 6 | ) |
2 15 | x | + | 2 15 | x | + | 6 | = | 5 6 | x | − | 5 6 | ( | 2 | ÷ | 15 | × | x | + | 2 | ÷ | 15 | × | x | + | 6 | ) |
4 15 | x | + | 6 | = | 5 6 | x | − | 5 6 | ( | 2 | ÷ | 15 | × | x | + | 2 | ÷ | 15 | × | x | + | 6 | ) |
4 15 | x | + | 6 | = | 5 6 | x | − | 5 6 | × | 2 | ÷ | 15 | × | x | − | 5 6 | × | 2 | ÷ | 15 | × | x | − | 5 6 | × | 6 |
4 15 | x | + | 6 | = | 5 6 | x | − | 1 9 | x | − | 1 9 | x | − | 5 |
4 15 | x | + | 6 | = | 11 18 | x | − | 5 |
4 15 | x | − | 11 18 | x | = | - | 5 | − | 6 |
| - | 31 90 | x | = | - | 5 | − | 6 |
| - | 31 90 | x | = | - | 11 |
| 11 | = | 31 90 | x |
31 90 | x | = | 11 |
| x | = | 11 | ÷ | 31 90 |
| = | 11 | × | 90 31 |
| x | = | 990 31 |
| x | = | 31.935484 |