| 17 | ÷ | 4457 50 | + | 25 | ÷ | 1650 | + | X | ÷ | 200 | + | ( | 105 2 | − | X | ) | ÷ | 1000 | = | 9 25 |
| 方程左边 = | 850 4457 | + | 1 66 | + | X | × | 1 200 | + | ( | 105 2 | − | X | ) | × | 1 1000 |
| = | 60557 294162 | + | 1 200 | X | + | ( | 105 2 | − | X | ) | × | 1 1000 |
60557 294162 | + | 1 200 | X | + | ( | 105 2 | − | X | ) | × | 1 1000 | = | 9 25 |
| 方程左边 = | 60557 294162 | + | 1 200 | X | + | 105 2 | × | 1 1000 | − | X | × | 1 1000 |
| = | 60557 294162 | + | 1 200 | X | + | 21 400 | − | X | × | 1 1000 |
| = | 15200101 58832400 | + | 1 250 | X |
15200101 58832400 | + | 1 250 | X | = | 9 25 |
1 250 | X | = | 9 25 | − | 15200101 58832400 |
1 250 | X | = | 5979563 58832400 |
| X | = | 5979563 58832400 | ÷ | 1 250 |
| = | 5979563 58832400 | × | 250 |
| = | 5979563 1176648 | × | 5 |
| X | = | 29897815 1176648 |
| X | = | 25.409311 |