| 6 | x | + | 5 | x | − | ( | 6 | x | − | 1 | ÷ | 6 | ) | = | 180 |
| 方程左边 = | 11 | x | − | ( | 6 | x | − | 1 | ÷ | 6 | ) |
| 11 | x | − | ( | 6 | x | − | 1 | ÷ | 6 | ) | = | 180 |
| 方程左边 = | 11 | x | − | 6 | x | + | 1 | ÷ | 6 |
| = | 11 | x | − | 6 | x | + | 1 6 |
| = | 5 | x | + | 1 6 |
| 5 | x | + | 1 6 | = | 180 |
| 5 | x | = | 180 | − | 1 6 |
| 5 | x | = | 1079 6 |
| x | = | 1079 6 | ÷ | 5 |
| = | 1079 6 | × | 1 5 |
| x | = | 1079 30 |
| x | = | 35.966667 |