| x | × | 2 | ÷ | 15 | + | x | × | 2 | ÷ | 15 | + | 6 | ÷ | x | − | ( | x | × | 2 | ÷ | 15 | + | x | × | 2 | ÷ | 15 | + | 6 | ) | = | 3 | ÷ | 7 |
| 方程两边同时乘以: | x |
| x | × | 2 | ÷ | 15 | × | x | + | x | × | 2 | ÷ | 15 | × | x | + | 6 | − | ( | x | × | 2 | ÷ | 15 | + | x | × | 2 | ÷ | 15 | + | 6 | ) | x | = | 3 | ÷ | 7 | × | x |
| x | × | 2 | ÷ | 15 | × | x | + | x | × | 2 | ÷ | 15 | × | x | + | 6 | − | x | × | 2 | ÷ | 15 | = | 3 | ÷ | 7 | × | x |
| x | × | 2 15 | x | + | x | × | 2 15 | x | + | 6 | − | x | × | 2 15 | x | − | x | × | 2 15 | = | 3 7 | x |
| x1= | 14 15 |