| ( | 49 | ÷ | x | ) | ( | 1752878 | − | x | ) | = | 51 |
| 49 | ÷ | x | × | ( | 1752878 | − | x | ) | = | 51 |
| 方程两边同时乘以: | x |
| 49 | ( | 1752878 | − | x | ) | = | 51 | x |
| 49 | × | 1752878 | − | 49 | x | = | 51 | x |
| 85891022 | − | 49 | x | = | 51 | x |
| - | 49 | x | − | 51 | x | = | - | 85891022 |
| - | 100 | x | = | - | 85891022 |
| 85891022 | = | 100 | x |
| 100 | x | = | 85891022 |
| x | = | 85891022 | ÷ | 100 |
| = | 85891022 | × | 1 100 |
| = | 42945511 | × | 1 50 |
| x | = | 42945511 50 |
| x | = | 858910.22 |