| ( | X | − | 10193 10 | − | 5000 | ) | × | 1 10 | − | 210 | = | X | − | 484653 50 | − | 10193 10 |
| 方程左边 = | X | × | 1 10 | − | 10193 10 | × | 1 10 | − | 5000 | × | 1 10 | − | 210 |
| = | X | × | 1 10 | − | 10193 100 | − | 500 | − | 210 |
| = | 1 10 | X | − | 81193 100 |
1 10 | X | − | 81193 100 | = | X | − | 484653 50 | − | 10193 10 |
| 方程右边 = | X | − | 267809 25 |
1 10 | X | − | 81193 100 | = | X | − | 267809 25 |
1 10 | X | − | X | = | - | 267809 25 | + | 81193 100 |
| - | 9 10 | X | = | - | 267809 25 | + | 81193 100 |
| - | 9 10 | X | = | - | 990043 100 |
990043 100 | = | 9 10 | X |
9 10 | X | = | 990043 100 |
| X | = | 990043 100 | ÷ | 9 10 |
| = | 990043 100 | × | 10 9 |
| = | 990043 10 | × | 1 9 |
| X | = | 990043 90 |
| X | = | 11000.477778 |