| 6000 | ( | 1 | − | x | ) | × | 2 | = | 4860 |
| 方程左边 = | 12000 | ( | 1 | − | x | ) |
| 12000 | ( | 1 | − | x | ) | = | 4860 |
| 方程左边 = | 12000 | × | 1 | − | 12000 | x |
| = | 12000 | − | 12000 | x |
| 12000 | − | 12000 | x | = | 4860 |
| - | 12000 | x | = | 4860 | − | 12000 |
| - | 12000 | x | = | - | 7140 |
| 7140 | = | 12000 | x |
| 12000 | x | = | 7140 |
| x | = | 7140 | ÷ | 12000 |
| = | 7140 | × | 1 12000 |
| = | 119 | × | 1 200 |
| x | = | 119 200 |
| x | = | 0.595 |