| ( | 4 | x | + | 5 | + | 3 | ) | ÷ | ( | 5 | x | − | 3 | ) | = | 5 | ÷ | 3 |
| 方程两边同时乘以: | ( | 5 | x | − | 3 | ) |
| ( | 4 | x | + | 5 | + | 3 | ) | = | 5 | ÷ | 3 | × | ( | 5 | x | − | 3 | ) |
| 4 | x | + | 5 | + | 3 | = | 5 | ÷ | 3 | × | ( | 5 | x | − | 3 | ) |
| 4 | x | + | 5 | + | 3 | = | 5 | ÷ | 3 | × | 5 | x | − | 5 | ÷ | 3 | × | 3 |
| 4 | x | + | 5 | + | 3 | = | 25 3 | x | − | 5 |
| 4 | x | + | 8 | = | 25 3 | x | − | 5 |
| 4 | x | − | 25 3 | x | = | - | 5 | − | 8 |
| - | 13 3 | x | = | - | 5 | − | 8 |
| - | 13 3 | x | = | - | 13 |
| 13 | = | 13 3 | x |
13 3 | x | = | 13 |
| x | = | 13 | ÷ | 13 3 |
| = | 13 | × | 3 13 |
| = | 1 | × | 3 |
| x | = | 3 |