| 10 | ÷ | 1000 | + | ( | 422 5 | − | X | ) | ÷ | 1650 | + | X | ÷ | 6679 50 | = | 171 1000 |
| 方程左边 = | 1 100 | + | ( | 422 5 | − | X | ) | × | 1 1650 | + | X | × | 50 6679 |
1 100 | + | ( | 422 5 | − | X | ) | × | 1 1650 | + | 50 6679 | X | = | 171 1000 |
| 方程左边 = | 1 100 | + | 422 5 | × | 1 1650 | − | X | × | 1 1650 | + | 50 6679 | X |
| = | 1 100 | + | 211 4125 | − | X | × | 1 1650 | + | 50 6679 | X |
| = | 1009 16500 | + | 75821 11020350 | X |
1009 16500 | + | 75821 11020350 | X | = | 171 1000 |
75821 11020350 | X | = | 171 1000 | − | 1009 16500 |
75821 11020350 | X | = | 29 264 |
| X | = | 29 264 | ÷ | 75821 11020350 |
| = | 29 264 | × | 11020350 75821 |
| = | 29 4 | × | 166975 75821 |
| X | = | 4842275 303284 |
| X | = | 15.966141 |