| x | × | 999 100 | + | ( | 38 | − | x | ) | × | 1199 100 | = | 51 5 | × | 38 |
| 方程左边 = | 999 100 | x | + | 38 | × | 1199 100 | − | x | × | 1199 100 |
| = | 999 100 | x | + | 22781 50 | − | x | × | 1199 100 |
| = | - | 2 | x | + | 22781 50 |
| - | 2 | x | + | 22781 50 | = | 51 5 | × | 38 |
| 方程右边 = | 1938 5 |
| - | 2 | x | + | 22781 50 | = | 1938 5 |
| - | 2 | x | = | 1938 5 | − | 22781 50 |
| - | 2 | x | = | - | 3401 50 |
3401 50 | = | 2 | x |
| 2 | x | = | 3401 50 |
| x | = | 3401 50 | ÷ | 2 |
| = | 3401 50 | × | 1 2 |
| x | = | 3401 100 |
| x | = | 34.01 |