| X | = | 249 2 | + | 1 20 | X | + | 1 10 | X | + | 17 100 | X | ÷ | 117 100 | + | 3 10 | X | ÷ | 117 100 |
| 方程右边 = | 249 2 | + | 1 20 | X | + | 1 10 | X | + | 17 117 | X | + | 10 39 | X |
| = | 249 2 | + | 1291 2340 | X |
| X | = | 249 2 | + | 1291 2340 | X |
| X | − | 1291 2340 | X | = | 249 2 |
1049 2340 | X | = | 249 2 |
| X | = | 249 2 | ÷ | 1049 2340 |
| = | 249 2 | × | 2340 1049 |
| = | 249 | × | 1170 1049 |
| X | = | 291330 1049 |
| X | = | 277.72164 |