| ( | x | − | ( | x | − | 30500 | ) | × | 13 100 | ) | = | 30500 | ÷ | 18 25 |
| 方程左边 = | x | − | ( | x | − | 30500 | ) | × | 13 100 |
| = | x | − | x | × | 13 100 | + | 30500 | × | 13 100 |
| = | x | − | x | × | 13 100 | + | 3965 |
| = | 87 100 | x | + | 3965 |
87 100 | x | + | 3965 | = | 30500 | ÷ | 18 25 |
| 方程右边 = | 381250 9 |
87 100 | x | + | 3965 | = | 381250 9 |
87 100 | x | = | 381250 9 | − | 3965 |
87 100 | x | = | 345565 9 |
| x | = | 345565 9 | ÷ | 87 100 |
| = | 345565 9 | × | 100 87 |
| x | = | 34556500 783 |
| x | = | 44133.461047 |