| 6 | ( | - | 8 | ( | 6 | ( | x | + | 13 | ) | + | 1 | ) | − | 15 | ) | + | 6 | = | - | 10 | ( | 5 | x | + | 5 | ) | − | 18 |
| 方程左边 = | - | 6 | × | 8 | ( | 6 | ( | x | + | 13 | ) | + | 1 | ) | − | 6 | × | 15 | + | 6 |
| = | - | 48 | ( | 6 | ( | x | + | 13 | ) | + | 1 | ) | − | 90 | + | 6 |
| = | - | 48 | ( | 6 | ( | x | + | 13 | ) | + | 1 | ) | − | 84 |
| = | - | 48 | × | 6 | ( | x | + | 13 | ) | − | 48 | × | 1 | − | 84 |
| = | - | 288 | ( | x | + | 13 | ) | − | 48 | − | 84 |
| = | - | 288 | ( | x | + | 13 | ) | − | 132 |
| = | - | 288 | x | − | 288 | × | 13 | − | 132 |
| = | - | 288 | x | − | 3744 | − | 132 |
| = | - | 288 | x | − | 3876 |
| - | 288 | x | − | 3876 | = | - | 10 | ( | 5 | x | + | 5 | ) | − | 18 |
| 方程右边 = | - | 10 | × | 5 | x | − | 10 | × | 5 | − | 18 |
| = | - | 50 | x | − | 50 | − | 18 |
| = | - | 50 | x | − | 68 |
| - | 288 | x | − | 3876 | = | - | 50 | x | − | 68 |
| - | 288 | x | + | 50 | x | = | - | 68 | + | 3876 |
| - | 238 | x | = | - | 68 | + | 3876 |
| - | 238 | x | = | 3808 |
| - | 3808 | = | 238 | x |
| 238 | x | = | - | 3808 |
| x | = | - | 3808 | ÷ | 238 |
| = | - | 3808 | × | 1 238 |
| = | - | 16 | × | 1 |
| x | = | - | 16 |