471 50 | ÷ | ( | 471 50 | + | X | ) | = | 3 20 |
| 方程两边同时乘以: | ( | 471 50 | + | X | ) |
471 50 | = | 3 20 | ( | 471 50 | + | X | ) |
471 50 | = | 3 20 | × | 471 50 | + | 3 20 | X |
471 50 | = | 1413 1000 | + | 3 20 | X |
| - | 3 20 | X | = | 1413 1000 | − | 471 50 |
| - | 3 20 | X | = | - | 8007 1000 |
8007 1000 | = | 3 20 | X |
3 20 | X | = | 8007 1000 |
| X | = | 8007 1000 | ÷ | 3 20 |
| = | 8007 1000 | × | 20 3 |
| = | 2669 50 | × | 1 |
| X | = | 2669 50 |
| X | = | 53.38 |