| 94 | ÷ | ( | 161 | + | x | ) | = | 309 500 |
| 方程两边同时乘以: | ( | 161 | + | x | ) |
| 94 | = | 309 500 | ( | 161 | + | x | ) |
| 94 | = | 309 500 | × | 161 | + | 309 500 | x |
| 94 | = | 49749 500 | + | 309 500 | x |
| - | 309 500 | x | = | 49749 500 | − | 94 |
| - | 309 500 | x | = | 2749 500 |
| - | 2749 500 | = | 309 500 | x |
309 500 | x | = | - | 2749 500 |
| x | = | - | 2749 500 | ÷ | 309 500 |
| = | - | 2749 500 | × | 500 309 |
| = | - | 2749 | × | 1 309 |
| x | = | - | 2749 309 |
| x | = | - 8.89644 |