| 6 | ( | 5 | + | 3 | ( | 6 | + | 4 | x | ) | + | 6 | ) | + | 9 | = | 4 | ( | 5 | + | 8 | x | ) | + | 8 |
| 方程左边 = | 6 | × | 5 | + | 6 | × | 3 | ( | 6 | + | 4 | x | ) | + | 6 | × | 6 | + | 9 |
| = | 30 | + | 18 | ( | 6 | + | 4 | x | ) | + | 36 | + | 9 |
| = | 75 | + | 18 | ( | 6 | + | 4 | x | ) |
| = | 75 | + | 18 | × | 6 | + | 18 | × | 4 | x |
| = | 75 | + | 108 | + | 72 | x |
| = | 183 | + | 72 | x |
| 183 | + | 72 | x | = | 4 | ( | 5 | + | 8 | x | ) | + | 8 |
| 方程右边 = | 4 | × | 5 | + | 4 | × | 8 | x | + | 8 |
| = | 20 | + | 32 | x | + | 8 |
| = | 28 | + | 32 | x |
| 183 | + | 72 | x | = | 28 | + | 32 | x |
| 72 | x | − | 32 | x | = | 28 | − | 183 |
| 40 | x | = | 28 | − | 183 |
| 40 | x | = | - | 155 |
| x | = | - | 155 | ÷ | 40 |
| = | - | 155 | × | 1 40 |
| = | - | 31 | × | 1 8 |
| x | = | - | 31 8 |
| x | = | - 3.875 |