| 14 | ÷ | ( | 7 | − | 9 | ( | 2 | x | + | 19 | ) | ) | + | 4 | = | - | 3 |
| 方程两边同时乘以: | ( | 7 | − | 9 | ( | 2 | x | + | 19 | ) | ) |
| 14 | + | 4 | ( | 7 | − | 9 | ( | 2 | x | + | 19 | ) | ) | = | - | 3 | ( | 7 | − | 9 | ( | 2 | x | + | 19 | ) | ) |
| 14 | + | 4 | × | 7 | − | 4 | × | 9 | ( | 2 | x | + | 19 | ) | = | - | 3 | ( | 7 | − | 9 | ( | 2 | x | + | 19 | ) | ) |
| 14 | + | 4 | × | 7 | − | 4 | × | 9 | ( | 2 | x | + | 19 | ) | = | - | 3 | × | 7 | + | 3 | × | 9 | ( | 2 | x | + | 19 | ) |
| 14 | + | 28 | − | 36 | ( | 2 | x | + | 19 | ) | = | - | 21 | + | 27 | ( | 2 | x | + | 19 | ) |
| 42 | − | 36 | ( | 2 | x | + | 19 | ) | = | - | 21 | + | 27 | ( | 2 | x | + | 19 | ) |
| 42 | − | 36 | × | 2 | x | − | 36 | × | 19 | = | - | 21 | + | 27 | ( | 2 | x | + | 19 | ) |
| 42 | − | 36 | × | 2 | x | − | 36 | × | 19 | = | - | 21 | + | 27 | × | 2 | x | + | 27 | × | 19 |
| 42 | − | 72 | x | − | 684 | = | - | 21 | + | 54 | x | + | 513 |
| - | 642 | − | 72 | x | = | 492 | + | 54 | x |
| - | 72 | x | − | 54 | x | = | 492 | + | 642 |
| - | 126 | x | = | 492 | + | 642 |
| - | 126 | x | = | 1134 |
| - | 1134 | = | 126 | x |
| 126 | x | = | - | 1134 |
| x | = | - | 1134 | ÷ | 126 |
| = | - | 1134 | × | 1 126 |
| = | - | 9 | × | 1 |
| x | = | - | 9 |