| X | = | ( | 101200 | − | X | ) | ÷ | 3 100 |
| 方程右边 = | 101200 | × | 100 3 | − | X | × | 100 3 |
| = | 10120000 3 | − | X | × | 100 3 |
| X | = | 10120000 3 | − | 100 3 | X |
| X | + | 100 3 | X | = | 10120000 3 |
103 3 | X | = | 10120000 3 |
| X | = | 10120000 3 | ÷ | 103 3 |
| = | 10120000 3 | × | 3 103 |
| = | 10120000 | × | 1 103 |
| X | = | 10120000 103 |
| X | = | 98252.427184 |