| 53361 | ÷ | ( | ( | 18703 | + | X | ) | ÷ | 2 | ) | = | 4 |
| 方程两边同时乘以: | ( | ( | 18703 | + | X | ) | ÷ | 2 | ) |
| 53361 | = | 4 | ( | ( | 18703 | + | X | ) | ÷ | 2 | ) |
| 53361 | = | 4 | ( | 18703 | + | X | ) | ÷ | 2 |
| 53361 | = | 2 | ( | 18703 | + | X | ) |
| 53361 | = | 2 | × | 18703 | + | 2 | X |
| 53361 | = | 37406 | + | 2 | X |
| - | 2 | X | = | 37406 | − | 53361 |
| - | 2 | X | = | - | 15955 |
| 15955 | = | 2 | X |
| 2 | X | = | 15955 |
| X | = | 15955 | ÷ | 2 |
| = | 15955 | × | 1 2 |
| X | = | 15955 2 |
| X | = | 7977.5 |