| 6 | x | × | 5 | − | 75 | x | × | 4 | + | 340 | x | × | 3 | − | 675 | x | × | 2 | = | 0 |
| 方程左边 = | 30 | x | − | 300 | x | + | 1020 | x | − | 1350 | x | + | 548 | x | − | 120 |
| = | - | 52 | x | − | 120 |
| - | 52 | x | − | 120 | = | 0 |
| - | 52 | x | = | 0 | + | 120 |
| - | 52 | x | = | 120 |
| - | 120 | = | 52 | x |
| 52 | x | = | - | 120 |
| x | = | - | 120 | ÷ | 52 |
| = | - | 120 | × | 1 52 |
| = | - | 30 | × | 1 13 |
| x | = | - | 30 13 |
| x | = | - 2.307692 |