| 4 | ( | x | + | 5 | ) | − | 11 | ( | 4 | x | − | 6 | ) | + | 2 | = | 8 |
| 方程左边 = | 4 | x | + | 4 | × | 5 | − | 11 | ( | 4 | x | − | 6 | ) | + | 2 |
| = | 4 | x | + | 20 | − | 11 | ( | 4 | x | − | 6 | ) | + | 2 |
| = | 4 | x | + | 22 | − | 11 | ( | 4 | x | − | 6 | ) |
| = | 4 | x | + | 22 | − | 11 | × | 4 | x | + | 11 | × | 6 |
| = | 4 | x | + | 22 | − | 44 | x | + | 66 |
| = | - | 40 | x | + | 88 |
| - | 40 | x | + | 88 | = | 8 |
| - | 40 | x | = | 8 | − | 88 |
| - | 40 | x | = | - | 80 |
| 80 | = | 40 | x |
| 40 | x | = | 80 |
| x | = | 80 | ÷ | 40 |
| = | 80 | × | 1 40 |
| = | 2 | × | 1 |
| x | = | 2 |