| ( | 1299207 50 | − | X | ÷ | 101 100 | × | 1 100 | ) | × | 28 25 | = | 30210891 100 | − | X |
| 方程左边 = | 1299207 50 | × | 28 25 | − | X | ÷ | 101 100 | × | 1 100 | × | 28 25 |
| = | 18188898 625 | − | X | × | 28 2525 |
18188898 625 | − | 28 2525 | X | = | 30210891 100 | − | X |
| - | 28 2525 | X | + | X | = | 30210891 100 | − | 18188898 625 |
| - | - | 2497 2525 | X | = | 30210891 100 | − | 18188898 625 |