| ( | 76705 | − | 5 2 | X | ) | × | 9 | ÷ | 20 | × | 9 10 | = | 22247 | + | 15 2 | X |
| 方程左边 = | ( | 76705 | − | 5 2 | X | ) | × | 81 200 |
| ( | 76705 | − | 5 2 | X | ) | × | 81 200 | = | 22247 | + | 15 2 | X |
| 方程左边 = | 76705 | × | 81 200 | − | 5 2 | X | × | 81 200 |
| = | 1242621 40 | − | 81 80 | X |
1242621 40 | − | 81 80 | X | = | 22247 | + | 15 2 | X |
| - | 81 80 | X | − | 15 2 | X | = | 22247 | − | 1242621 40 |
| - | 681 80 | X | = | 22247 | − | 1242621 40 |
| - | 681 80 | X | = | - | 352741 40 |
352741 40 | = | 681 80 | X |
681 80 | X | = | 352741 40 |
| X | = | 352741 40 | ÷ | 681 80 |
| = | 352741 40 | × | 80 681 |
| = | 352741 | × | 2 681 |
| X | = | 705482 681 |
| X | = | 1035.950073 |