| 10 | ( | 7 | x | + | 6 | ) | − | 6 | ( | 4 | x | − | 1 | ) | = | - | 15 | ( | 3 | x | + | 1 | ) | + | 330 |
| 方程左边 = | 10 | × | 7 | x | + | 10 | × | 6 | − | 6 | ( | 4 | x | − | 1 | ) |
| = | 70 | x | + | 60 | − | 6 | ( | 4 | x | − | 1 | ) |
| = | 70 | x | + | 60 | − | 6 | × | 4 | x | + | 6 | × | 1 |
| = | 70 | x | + | 60 | − | 24 | x | + | 6 |
| = | 46 | x | + | 66 |
| 46 | x | + | 66 | = | - | 15 | ( | 3 | x | + | 1 | ) | + | 330 |
| 方程右边 = | - | 15 | × | 3 | x | − | 15 | × | 1 | + | 330 |
| = | - | 45 | x | − | 15 | + | 330 |
| = | - | 45 | x | + | 315 |
| 46 | x | + | 66 | = | - | 45 | x | + | 315 |
| 46 | x | + | 45 | x | = | 315 | − | 66 |
| 91 | x | = | 315 | − | 66 |
| 91 | x | = | 249 |
| x | = | 249 | ÷ | 91 |
| = | 249 | × | 1 91 |
| x | = | 249 91 |
| x | = | 2.736264 |