| 20 | ÷ | 102 | + | 10 | ÷ | 447 10 | + | X | ÷ | 255 2 | + | ( | 342 5 | − | X | ) | ÷ | 1000 | = | 37 50 |
| 方程左边 = | 10 51 | + | 100 447 | + | X | × | 2 255 | + | ( | 342 5 | − | X | ) | × | 1 1000 |
| = | 3190 7599 | + | 2 255 | X | + | ( | 342 5 | − | X | ) | × | 1 1000 |
3190 7599 | + | 2 255 | X | + | ( | 342 5 | − | X | ) | × | 1 1000 | = | 37 50 |
| 方程左边 = | 3190 7599 | + | 2 255 | X | + | 342 5 | × | 1 1000 | − | X | × | 1 1000 |
| = | 3190 7599 | + | 2 255 | X | + | 171 2500 | − | X | × | 1 1000 |
| = | 9274429 18997500 | + | 349 51000 | X |
9274429 18997500 | + | 349 51000 | X | = | 37 50 |
349 51000 | X | = | 37 50 | − | 9274429 18997500 |
349 51000 | X | = | 4783721 18997500 |
| X | = | 4783721 18997500 | ÷ | 349 51000 |
| = | 4783721 18997500 | × | 51000 349 |
| = | 4783721 745 | × | 2 349 |
| X | = | 9567442 260005 |
| X | = | 36.797146 |