| ( | x | ÷ | 2 | ) | ÷ | ( | 650 | + | x | × | 10 100 | × | 50 100 | ) | = | 20 | ÷ | 7 |
| 方程两边同时乘以: | ( | 650 | + | x | × | 10 100 | × | 50 100 | ) |
| ( | x | ÷ | 2 | ) | = | 20 | ÷ | 7 | × | ( | 650 | + | x | × | 10 100 | × | 50 100 | ) |
| x | ÷ | 2 | = | 20 | ÷ | 7 | × | ( | 650 | + | x | × | 10 100 | × | 50 100 | ) |
| x | ÷ | 2 | = | 20 | ÷ | 7 | × | 650 | + | 20 | ÷ | 7 | × | x | × | 10 100 | × | 50 100 |
| x | × | 1 2 | = | 13000 7 | + | 1 7 | x |
1 2 | x | − | 1 7 | x | = | 13000 7 |
5 14 | x | = | 13000 7 |
| x | = | 13000 7 | ÷ | 5 14 |
| = | 13000 7 | × | 14 5 |
| = | 2600 | × | 2 |
| x | = | 5200 |