| ( | ( | 3208 | − | X | ) | ÷ | ( | X | − | 1075 | ) | ) | × | 100 | = | 4 5 |
| ( | 3208 | − | X | ) | ÷ | ( | X | − | 1075 | ) | × | 100 | = | 4 5 |
| 方程两边同时乘以: | ( | X | − | 1075 | ) |
| ( | 3208 | − | X | ) | × | 100 | = | 4 5 | ( | X | − | 1075 | ) |
| 3208 | × | 100 | − | X | × | 100 | = | 4 5 | ( | X | − | 1075 | ) |
| 3208 | × | 100 | − | X | × | 100 | = | 4 5 | X | − | 4 5 | × | 1075 |
| 320800 | − | X | × | 100 | = | 4 5 | X | − | 860 |
| - | 100 | X | − | 4 5 | X | = | - | 860 | − | 320800 |
| - | 504 5 | X | = | - | 860 | − | 320800 |
| - | 504 5 | X | = | - | 321660 |
| 321660 | = | 504 5 | X |
504 5 | X | = | 321660 |
| X | = | 321660 | ÷ | 504 5 |
| = | 321660 | × | 5 504 |
| = | 8935 | × | 5 14 |
| X | = | 44675 14 |
| X | = | 3191.071429 |