| ( | x | ÷ | 13 5 | ) | ÷ | ( | x | ÷ | 13 5 | + | 33 10 | ÷ | 127 100 | ) | = | 7 1000 |
| 方程两边同时乘以: | ( | x | ÷ | 13 5 | + | 33 10 | ÷ | 127 100 | ) |
| ( | x | ÷ | 13 5 | ) | = | 7 1000 | ( | x | ÷ | 13 5 | + | 33 10 | ÷ | 127 100 | ) |
| x | ÷ | 13 5 | = | 7 1000 | ( | x | ÷ | 13 5 | + | 33 10 | ÷ | 127 100 | ) |
| x | ÷ | 13 5 | = | 7 1000 | x | ÷ | 13 5 | + | 7 1000 | × | 33 10 | ÷ | 127 100 |
| x | × | 5 13 | = | 7 2600 | x | + | 231 12700 |
5 13 | x | − | 7 2600 | x | = | 231 12700 |
993 2600 | x | = | 231 12700 |
| x | = | 231 12700 | ÷ | 993 2600 |
| = | 231 12700 | × | 2600 993 |
| = | 77 127 | × | 26 331 |
| x | = | 2002 42037 |
| x | = | 0.047625 |