| ( | x | − | 883 5 | ) | ÷ | x | × | 100 100 | = | 28 100 |
| 方程两边同时乘以: | x |
| ( | x | − | 883 5 | ) | × | 100 100 | = | 28 100 | x |
| x | × | 100 100 | − | 883 5 | × | 100 100 | = | 28 100 | x |
| x | × | 100 100 | − | 883 5 | = | 28 100 | x |
100 100 | x | − | 28 100 | x | = | 883 5 |
18 25 | x | = | 883 5 |
| x | = | 883 5 | ÷ | 18 25 |
| = | 883 5 | × | 25 18 |
| = | 883 | × | 5 18 |
| x | = | 4415 18 |
| x | = | 245.277778 |