| x | − | 600 | − | 300 | ÷ | 7000 | = | x | − | 256 | − | 368 | ÷ | 6360 |
| 方程左边 = | x | − | 600 | − | 3 70 |
| = | x | − | 42003 70 |
| x | − | 42003 70 | = | x | − | 256 | − | 368 | ÷ | 6360 |
| 方程右边 = | x | − | 256 | − | 46 795 |
| = | x | − | 203566 795 |
| x | − | 42003 70 | = | x | − | 203566 795 |
| x | − | x | = | - | 203566 795 | + | 42003 70 |
| 0 | x | = | - | 203566 795 | + | 42003 70 |
| 0 | x | = | 3828553 11130 |