| ( | 17 | ÷ | 20 | ) | X | − | ( | 3797 | ÷ | 18985 | ) | X | = | 192426047 |
| 方程左边 = | 17 | ÷ | 20 | × | X | − | ( | 3797 | ÷ | 18985 | ) | X |
| = | 17 20 | X | − | ( | 3797 | ÷ | 18985 | ) | X |
| = | 17 20 | X | − | 3797 | ÷ | 18985 | × | X |
| = | 17 20 | X | − | 3797 18985 | X |
| = | 49361 75940 | X |
49361 75940 | X | = | 192426047 |
| X | = | 192426047 | ÷ | 49361 75940 |
| = | 192426047 | × | 75940 49361 |
| X | = | 14612834009180 49361 |