| x | × | 10 100 | + | 55000 | + | ( | x | − | 100000 | ) | × | 13 100 | = | x |
| 方程左边 = | 10 100 | x | + | 55000 | + | x | × | 13 100 | − | 100000 | × | 13 100 |
| = | 10 100 | x | + | 55000 | + | x | × | 13 100 | − | 13000 |
| = | 23 100 | x | + | 42000 |
23 100 | x | + | 42000 | = | x |
23 100 | x | − | x | = | - | 42000 |
| - | 77 100 | x | = | - | 42000 |
| 42000 | = | 77 100 | x |
77 100 | x | = | 42000 |
| x | = | 42000 | ÷ | 77 100 |
| = | 42000 | × | 100 77 |
| = | 6000 | × | 100 11 |
| x | = | 600000 11 |
| x | = | 54545.454545 |