| ( | 11845 2 | − | x | ) | ÷ | x | = | - | 21 1000 |
| 方程两边同时乘以: | x |
| ( | 11845 2 | − | x | ) | = | - | 21 1000 | x |
11845 2 | − | x | = | - | 21 1000 | x |
| - | x | + | 21 1000 | x | = | - | 11845 2 |
| - | 979 1000 | x | = | - | 11845 2 |
11845 2 | = | 979 1000 | x |
979 1000 | x | = | 11845 2 |
| x | = | 11845 2 | ÷ | 979 1000 |
| = | 11845 2 | × | 1000 979 |
| = | 11845 | × | 500 979 |
| x | = | 5922500 979 |
| x | = | 6049.540347 |