| ( | 31 | ÷ | 10 | ) | ÷ | ( | x | − | 3 | ÷ | 5 | ) | = | 13 | ÷ | 10 |
| 方程两边同时乘以: | ( | x | − | 3 | ÷ | 5 | ) |
| ( | 31 | ÷ | 10 | ) | = | 13 | ÷ | 10 | × | ( | x | − | 3 | ÷ | 5 | ) |
| 31 | ÷ | 10 | = | 13 | ÷ | 10 | × | ( | x | − | 3 | ÷ | 5 | ) |
| 31 | ÷ | 10 | = | 13 | ÷ | 10 | × | x | − | 13 | ÷ | 10 | × | 3 | ÷ | 5 |
31 10 | = | 13 10 | x | − | 39 50 |
| - | 13 10 | x | = | - | 39 50 | − | 31 10 |
| - | 13 10 | x | = | - | 97 25 |
97 25 | = | 13 10 | x |
13 10 | x | = | 97 25 |
| x | = | 97 25 | ÷ | 13 10 |
| = | 97 25 | × | 10 13 |
| = | 97 5 | × | 2 13 |
| x | = | 194 65 |
| x | = | 2.984615 |