| 20 | ÷ | 102 | + | 6 | ÷ | 447 10 | + | X | ÷ | 255 2 | = | 37 50 |
| 方程左边 = | 10 51 | + | 20 149 | + | X | × | 2 255 |
| = | 2510 7599 | + | 2 255 | X |
2510 7599 | + | 2 255 | X | = | 37 50 |
2 255 | X | = | 37 50 | − | 2510 7599 |
2 255 | X | = | 155663 379950 |
| X | = | 155663 379950 | ÷ | 2 255 |
| = | 155663 379950 | × | 255 2 |
| = | 155663 1490 | × | 1 2 |
| X | = | 155663 2980 |
| X | = | 52.235906 |