| ( | 13 | − | x | ) | ÷ | ( | 13 100 | − | 14 100 | ) | = | 256 125 | − | 2527 500 |
| 方程两边同时乘以: | ( | 13 100 | − | 14 100 | ) |
| ( | 13 | − | x | ) | = | 256 125 | ( | 13 100 | − | 14 100 | ) | − | 2527 500 | ( | 13 100 | − | 14 100 | ) |
| 13 | − | x | = | 256 125 | ( | 13 100 | − | 14 100 | ) | − | 2527 500 | ( | 13 100 | − | 14 100 | ) |
| 13 | − | x | = | 256 125 | × | 13 100 | − | 256 125 | × | 14 100 | − | 2527 500 | ( | 13 100 | − | 14 100 | ) |
| 13 | − | x | = | 832 3125 | − | 896 3125 | − | 2527 500 | ( | 13 100 | − | 14 100 | ) |
| 13 | − | x | = | - | 64 3125 | − | 2527 500 | ( | 13 100 | − | 14 100 | ) |
| 13 | − | x | = | - | 64 3125 | − | 2527 500 | × | 13 100 | + | 2527 500 | × | 14 100 |
| 13 | − | x | = | - | 64 3125 | − | 32851 50000 | + | 17689 25000 |
| 13 | − | x | = | 1503 50000 |
| - | x | = | 1503 50000 | − | 13 |
| - | x | = | - | 648497 50000 |
648497 50000 | = | x |
| x | = | 648497 50000 |