| ( | 1 | ÷ | x | + | 1 | ÷ | x | + | 1 | ÷ | x | + | 1 | ÷ | x | + | 1 | ÷ | x | + | 1 | ÷ | x | ) | × | 13 | = | 37 |
| 1 | ÷ | x | × | 13 | + | 1 | ÷ | x | × | 13 | + | 1 | ÷ | x | × | 13 | + | 1 | ÷ | x | × | 13 | = | 37 |
| 13 | ÷ | x | + | 13 | ÷ | x | + | 13 | ÷ | x | + | 13 | ÷ | x | + | 13 | ÷ | x | + | 13 | ÷ | x | = | 37 |
| 方程两边同时乘以: | x |
| 13 | + | 13 | ÷ | 1 | × | 1 | + | 13 | ÷ | 1 | × | 1 | + | 13 | ÷ | 1 | × | 1 | + | 13 | ÷ | 1 | = | 37 | x |
| - | 37 | x | = | - | 13 | − | 13 | ÷ | 1 | × | 1 | − | 13 | ÷ | 1 | × | 1 | − | 13 | ÷ | 1 | × | 1 | − | 13 | ÷ | 1 |
| - | 37 | x | = | - | 13 | − | 13 | − | 13 | − | 13 | − | 13 | − | 13 |
| - | 37 | x | = | - | 78 |
| 78 | = | 37 | x |
| 37 | x | = | 78 |
| x | = | 78 | ÷ | 37 |
| = | 78 | × | 1 37 |
| x | = | 78 37 |
| x | = | 2.108108 |