| 1255000 | − | x | − | ( | 1255000 | − | x | ) | × | 3 50 | = | 1255000 | × | 1 20 |
| 方程左边 = | 1255000 | − | x | − | 1255000 | × | 3 50 | + | x | × | 3 50 |
| = | 1255000 | − | x | − | 75300 | + | x | × | 3 50 |
| = | 1179700 | − | 47 50 | x |
| 1179700 | − | 47 50 | x | = | 1255000 | × | 1 20 |
| 方程右边 = | 62750 |
| 1179700 | − | 47 50 | x | = | 62750 |
| - | 47 50 | x | = | 62750 | − | 1179700 |
| - | 47 50 | x | = | - | 1116950 |
| 1116950 | = | 47 50 | x |
47 50 | x | = | 1116950 |
| x | = | 1116950 | ÷ | 47 50 |
| = | 1116950 | × | 50 47 |
| x | = | 55847500 47 |
| x | = | 1188244.680851 |