| ( | 7 | − | x | ) | ÷ | ( | 7 | − | 6 | ) | = | - | 499 5000 | − | 561 5000 |
| 方程两边同时乘以: | ( | 7 | − | 6 | ) |
| ( | 7 | − | x | ) | = | - | 499 5000 | ( | 7 | − | 6 | ) | − | 561 5000 | ( | 7 | − | 6 | ) |
| 7 | − | x | = | - | 499 5000 | ( | 7 | − | 6 | ) | − | 561 5000 | ( | 7 | − | 6 | ) |
| 7 | − | x | = | - | 499 5000 | × | 7 | + | 499 5000 | × | 6 | − | 561 5000 | ( | 7 | − | 6 | ) |
| 7 | − | x | = | - | 3493 5000 | + | 1497 2500 | − | 561 5000 | ( | 7 | − | 6 | ) |
| 7 | − | x | = | - | 499 5000 | − | 561 5000 | ( | 7 | − | 6 | ) |
| 7 | − | x | = | - | 499 5000 | − | 561 5000 | × | 7 | + | 561 5000 | × | 6 |
| 7 | − | x | = | - | 499 5000 | − | 3927 5000 | + | 1683 2500 |
| 7 | − | x | = | - | 53 250 |
| - | x | = | - | 53 250 | − | 7 |
| - | x | = | - | 1803 250 |
1803 250 | = | x |
| x | = | 1803 250 |