| ( | 1617 1000 | − | X | ) | × | 100 | = | ( | 85 | − | 150 | ) | × | 35 | ÷ | 60 |
| 方程左边 = | 1617 1000 | × | 100 | − | X | × | 100 |
| = | 1617 10 | − | X | × | 100 |
1617 10 | − | 100 | X | = | ( | 85 | − | 150 | ) | × | 35 | ÷ | 60 |
| 方程右边 = | ( | 85 | − | 150 | ) | × | 7 12 |
1617 10 | − | 100 | X | = | ( | 85 | − | 150 | ) | × | 7 12 |
| 方程右边 = | 85 | × | 7 12 | − | 150 | × | 7 12 |
| = | 595 12 | − | 175 2 |
| = | - | 455 12 |
1617 10 | − | 100 | X | = | - | 455 12 |
| - | 100 | X | = | - | 455 12 | − | 1617 10 |
| - | 100 | X | = | - | 11977 60 |
11977 60 | = | 100 | X |
| 100 | X | = | 11977 60 |
| X | = | 11977 60 | ÷ | 100 |
| = | 11977 60 | × | 1 100 |
| X | = | 11977 6000 |
| X | = | 1.996167 |