| 12 | x | ÷ | 44 | + | 12 | ( | 63 5 | − | x | ) | ÷ | 28 | = | 18 5 |
| 方程左边 = | 3 11 | x | + | 3 7 | ( | 63 5 | − | x | ) |
3 11 | x | + | 3 7 | ( | 63 5 | − | x | ) | = | 18 5 |
| 方程左边 = | 3 11 | x | + | 3 7 | × | 63 5 | − | 3 7 | x |
| = | 3 11 | x | + | 27 5 | − | 3 7 | x |
| = | - | 12 77 | x | + | 27 5 |
| - | 12 77 | x | + | 27 5 | = | 18 5 |
| - | 12 77 | x | = | 18 5 | − | 27 5 |
| - | 12 77 | x | = | - | 9 5 |
9 5 | = | 12 77 | x |
12 77 | x | = | 9 5 |
| x | = | 9 5 | ÷ | 12 77 |
| = | 9 5 | × | 77 12 |
| = | 3 5 | × | 77 4 |
| x | = | 231 20 |
| x | = | 11.55 |