| 1 | ÷ | x | − | 7 | − | 1 | ÷ | x | − | 4 | = | 1 | ÷ | x | − | 6 | − | 1 | ÷ | x | − | 3 |
| 方程两边同时乘以: | x |
| 1 | − | 7 | x | − | 1 | ÷ | 1 | × | 1 | − | 4 | x | = | 1 | ÷ | 1 | × | 1 | − | 6 | x | − | 1 | ÷ | 1 | × | 1 | − | 3 | x |
| - | 7 | x | − | 4 | x | + | 6 | x | + | 3 | x | = | 1 | ÷ | 1 | × | 1 | − | 1 | ÷ | 1 | × | 1 | − | 1 | + | 1 | ÷ | 1 | × | 1 |
| - | 7 | x | − | 4 | x | + | 6 | x | + | 3 | x | = | 1 | − | 1 | − | 1 | + | 1 |
| - | 2 | x | = | 1 | − | 1 | − | 1 | + | 1 |
| - | 2 | x | = | - | 0 |
| 0 | = | 2 | x |
| 2 | x | = | 0 |
| x | = | 0 | ÷ | 2 |
| = | 0 | × | 1 2 |
| x | = | 0 |
| x | = | 0 |