| ( | 5 | ( | 9 | + | x | ) | + | 3 | × | 3 | + | 1 | × | 2 | ) | ÷ | ( | 14 | + | x | ) | = | 23 5 |
| 方程两边同时乘以: | ( | 14 | + | x | ) |
| ( | 5 | ( | 9 | + | x | ) | + | 3 | × | 3 | + | 1 | × | 2 | ) | = | 23 5 | ( | 14 | + | x | ) |
| 5 | ( | 9 | + | x | ) | + | 3 | × | 3 | + | 1 | × | 2 | = | 23 5 | ( | 14 | + | x | ) |
| 5 | ( | 9 | + | x | ) | + | 3 | × | 3 | + | 1 | × | 2 | = | 23 5 | × | 14 | + | 23 5 | x |
| 5 | ( | 9 | + | x | ) | + | 9 | + | 2 | = | 322 5 | + | 23 5 | x |
| 5 | ( | 9 | + | x | ) | + | 11 | = | 322 5 | + | 23 5 | x |
| 5 | × | 9 | + | 5 | x | + | 11 | = | 322 5 | + | 23 5 | x |
| 45 | + | 5 | x | + | 11 | = | 322 5 | + | 23 5 | x |
| 56 | + | 5 | x | = | 322 5 | + | 23 5 | x |
| 5 | x | − | 23 5 | x | = | 322 5 | − | 56 |
2 5 | x | = | 322 5 | − | 56 |
2 5 | x | = | 42 5 |
| x | = | 42 5 | ÷ | 2 5 |
| = | 42 5 | × | 5 2 |
| = | 21 | × | 1 |
| x | = | 21 |