| x | x | ÷ | ( | 1 100 | − | x | ) | × | ( | 1 100 | − | x | ) | = | 223 100 |
| 方程两边同时乘以: | ( | 1 100 | − | x | ) |
| x | x | ( | 1 100 | − | x | ) | = | 223 100 | ( | 1 100 | − | x | ) |
| x | x | × | 1 100 | − | x | x | x | = | 223 100 | ( | 1 100 | − | x | ) |
| x | x | × | 1 100 | − | x | x | x | = | 223 100 | × | 1 100 | − | 223 100 | x |
| x | x | × | 1 100 | − | x | x | x | = | 223 10000 | − | 223 100 | x |
| x1= | - | √223 10 |
| x2= | √223 10 |