| 67 | ÷ | 111 | − | 9 | ÷ | 447 10 | − | 1 5 | = | 71 50000 | ( | 175 | + | X | ) |
| 方程左边 = | 67 111 | − | 30 149 | − | 1 5 |
| = | 16726 82695 |
16726 82695 | = | 71 50000 | ( | 175 | + | X | ) |
| 方程右边 = | 71 50000 | × | 175 | + | 71 50000 | X |
| = | 497 2000 | + | 71 50000 | X |
16726 82695 | = | 497 2000 | + | 71 50000 | X |
| - | 71 50000 | X | = | 497 2000 | − | 16726 82695 |
| - | 71 50000 | X | = | 1529483 33078000 |
| - | 1529483 33078000 | = | 71 50000 | X |
71 50000 | X | = | - | 1529483 33078000 |
| X | = | - | 1529483 33078000 | ÷ | 71 50000 |
| = | - | 1529483 33078000 | × | 50000 71 |
| = | - | 1529483 16539 | × | 25 71 |
| X | = | - | 38237075 1174269 |
| X | = | - 32.562449 |