| ( | 5 | ( | 439 | + | X | ) | + | 116 | + | 66 | + | 24 | + | 34 | ) | ÷ | ( | 439 | + | 29 | + | 22 | + | 12 | + | 34 | X | ) | = | 23 5 |
| 方程两边同时乘以: | ( | 439 | + | 29 | + | 22 | + | 12 | + | 34 | X | ) |
| ( | 5 | ( | 439 | + | X | ) | + | 116 | + | 66 | + | 24 | + | 34 | ) | = | 23 5 | ( | 439 | + | 29 | + | 22 | + | 12 | + | 34 | X | ) |
| 5 | ( | 439 | + | X | ) | + | 116 | + | 66 | + | 24 | + | 34 | = | 23 5 | ( | 439 | + | 29 | + | 22 | + | 12 | + | 34 | X | ) |
| 5 | ( | 439 | + | X | ) | + | 116 | + | 66 | + | 24 | + | 34 | = | 23 5 | × | 439 | + | 23 5 | × | 29 | + | 23 5 | × | 22 | + | 23 5 | × | 12 | + | 23 5 | × | 34 | X |
| 5 | ( | 439 | + | X | ) | + | 116 | + | 66 | + | 24 | + | 34 | = | 10097 5 | + | 667 5 | + | 506 5 | + | 276 5 | + | 782 5 | X |
| 5 | ( | 439 | + | X | ) | + | 240 | = | 11546 5 | + | 782 5 | X |
| 5 | × | 439 | + | 5 | X | + | 240 | = | 11546 5 | + | 782 5 | X |
| 2195 | + | 5 | X | + | 240 | = | 11546 5 | + | 782 5 | X |
| 2435 | + | 5 | X | = | 11546 5 | + | 782 5 | X |
| 5 | X | − | 782 5 | X | = | 11546 5 | − | 2435 |
| - | 757 5 | X | = | 11546 5 | − | 2435 |
| - | 757 5 | X | = | - | 629 5 |
629 5 | = | 757 5 | X |
757 5 | X | = | 629 5 |
| X | = | 629 5 | ÷ | 757 5 |
| = | 629 5 | × | 5 757 |
| = | 629 | × | 1 757 |
| X | = | 629 757 |
| X | = | 0.830911 |