| 6 | x | = | ( | 120 | ÷ | x | ) | + | ( | 16 | ÷ | 3 | − | 120 | ÷ | x | ) | x | × | 4 | ÷ | 5 | × | x |
| 6 | x | = | 120 | ÷ | x | + | ( | 16 | ÷ | 3 | − | 120 | ÷ | x | ) | x | × | 4 | ÷ | 5 | × | x |
| 6 | x | = | 120 | ÷ | x | + | ( | 16 | ÷ | 3 | − | 120 | ÷ | x | ) | x | × | 4 5 | x |
| 方程两边同时乘以: | x |
| 6 | x | x | = | 120 | + | ( | 16 | ÷ | 3 | − | 120 | ÷ | x | ) | x | × | 4 5 | x | x |
| 6 | x | x | = | 120 | + | 16 | ÷ | 3 | × | x | × | 4 5 | x | x | − | 120 | ÷ | x | × | x | × | 4 5 | x |
| 6 | x | x | = | 120 | + | 64 15 | x | x | x | − | 96 | ÷ | x | × | x | x | x |