| ( | 5131 5 | + | X | ) | × | 33 100 | = | X |
| 方程左边 = | 5131 5 | × | 33 100 | + | X | × | 33 100 |
| = | 169323 500 | + | X | × | 33 100 |
169323 500 | + | 33 100 | X | = | X |
33 100 | X | − | X | = | - | 169323 500 |
| - | 67 100 | X | = | - | 169323 500 |
169323 500 | = | 67 100 | X |
67 100 | X | = | 169323 500 |
| X | = | 169323 500 | ÷ | 67 100 |
| = | 169323 500 | × | 100 67 |
| = | 169323 5 | × | 1 67 |
| X | = | 169323 335 |
| X | = | 505.441791 |