| X | ÷ | 6679 50 | + | ( | 50 | − | X | ) | ÷ | 333 | = | 51 250 |
| 方程左边 = | 50 6679 | X | + | 50 | × | 1 333 | − | X | × | 1 333 |
| = | 50 6679 | X | + | 50 333 | − | X | × | 1 333 |
| = | 9971 2224107 | X | + | 50 333 |
9971 2224107 | X | + | 50 333 | = | 51 250 |
9971 2224107 | X | = | 51 250 | − | 50 333 |
9971 2224107 | X | = | 4483 83250 |
| X | = | 4483 83250 | ÷ | 9971 2224107 |
| = | 4483 83250 | × | 2224107 9971 |
| = | 4483 250 | × | 6679 9971 |
| X | = | 29941957 2492750 |
| X | = | 12.011616 |