| 3 | = | 100 | ( | x | − | 303 | ) | ÷ | ( | x | × | 1000 | ÷ | 100 | ) |
| 方程两边同时乘以: | ( | x | × | 1000 | ÷ | 100 | ) |
| 3 | ( | x | × | 1000 | ÷ | 100 | ) | = | 100 | ( | x | − | 303 | ) |
| 3 | x | × | 1000 | ÷ | 100 | = | 100 | ( | x | − | 303 | ) |
| 3 | x | × | 1000 | ÷ | 100 | = | 100 | x | − | 100 | × | 303 |
| 30 | x | = | 100 | x | − | 30300 |
| 30 | x | − | 100 | x | = | - | 30300 |
| - | 70 | x | = | - | 30300 |
| 30300 | = | 70 | x |
| 70 | x | = | 30300 |
| x | = | 30300 | ÷ | 70 |
| = | 30300 | × | 1 70 |
| = | 3030 | × | 1 7 |
| x | = | 3030 7 |
| x | = | 432.857143 |