| 17 | ÷ | 4457 50 | + | 12 | ÷ | 267 2 | + | X | ÷ | 1000 | + | ( | 663 10 | − | X | ) | ÷ | 1650 | = | 43 125 |
| 方程左边 = | 850 4457 | + | 8 89 | + | X | × | 1 1000 | + | ( | 663 10 | − | X | ) | × | 1 1650 |
| = | 111306 396673 | + | 1 1000 | X | + | ( | 663 10 | − | X | ) | × | 1 1650 |
111306 396673 | + | 1 1000 | X | + | ( | 663 10 | − | X | ) | × | 1 1650 | = | 43 125 |
| 方程左边 = | 111306 396673 | + | 1 1000 | X | + | 663 10 | × | 1 1650 | − | X | × | 1 1650 |
| = | 111306 396673 | + | 1 1000 | X | + | 221 5500 | − | X | × | 1 1650 |
| = | 699847733 2181701500 | + | 13 33000 | X |
699847733 2181701500 | + | 13 33000 | X | = | 43 125 |
13 33000 | X | = | 43 125 | − | 699847733 2181701500 |