| 6 | ( | 3 | ( | 2 | ( | 9 | x | − | 10 | ) | − | 2 | ) | − | 10 | ) | − | 7 | = | 6 | ( | 5 | x | + | 9 | ) | + | 71 |
| 方程左边 = | 6 | × | 3 | ( | 2 | ( | 9 | x | − | 10 | ) | − | 2 | ) | − | 6 | × | 10 | − | 7 |
| = | 18 | ( | 2 | ( | 9 | x | − | 10 | ) | − | 2 | ) | − | 60 | − | 7 |
| = | 18 | ( | 2 | ( | 9 | x | − | 10 | ) | − | 2 | ) | − | 67 |
| = | 18 | × | 2 | ( | 9 | x | − | 10 | ) | − | 18 | × | 2 | − | 67 |
| = | 36 | ( | 9 | x | − | 10 | ) | − | 36 | − | 67 |
| = | 36 | ( | 9 | x | − | 10 | ) | − | 103 |
| = | 36 | × | 9 | x | − | 36 | × | 10 | − | 103 |
| = | 324 | x | − | 360 | − | 103 |
| = | 324 | x | − | 463 |
| 324 | x | − | 463 | = | 6 | ( | 5 | x | + | 9 | ) | + | 71 |
| 方程右边 = | 6 | × | 5 | x | + | 6 | × | 9 | + | 71 |
| = | 30 | x | + | 54 | + | 71 |
| = | 30 | x | + | 125 |
| 324 | x | − | 463 | = | 30 | x | + | 125 |
| 324 | x | − | 30 | x | = | 125 | + | 463 |
| 294 | x | = | 125 | + | 463 |
| 294 | x | = | 588 |
| x | = | 588 | ÷ | 294 |
| = | 588 | × | 1 294 |
| = | 2 | × | 1 |
| x | = | 2 |