47 50 | ( | 1 2 | x | + | 20000 | ) | = | x |
| 方程左边 = | 47 50 | × | 1 2 | x | + | 47 50 | × | 20000 |
| = | 47 100 | x | + | 18800 |
47 100 | x | + | 18800 | = | x |
47 100 | x | − | x | = | - | 18800 |
| - | 53 100 | x | = | - | 18800 |
| 18800 | = | 53 100 | x |
53 100 | x | = | 18800 |
| x | = | 18800 | ÷ | 53 100 |
| = | 18800 | × | 100 53 |
| x | = | 1880000 53 |
| x | = | 35471.698113 |