| ( | 774 | + | x | ) | + | 487 | ÷ | ( | 896 | + | x | ) | = | 28 |
| 方程两边同时乘以: | ( | 896 | + | x | ) |
| ( | 774 | + | x | ) | ( | 896 | + | x | ) | + | 487 | = | 28 | ( | 896 | + | x | ) |
| 774 | ( | 896 | + | x | ) | + | x | ( | 896 | + | x | ) | + | 487 | = | 28 | ( | 896 | + | x | ) |
| 774 | ( | 896 | + | x | ) | + | x | ( | 896 | + | x | ) | + | 487 | = | 28 | × | 896 | + | 28 | x |
| 774 | ( | 896 | + | x | ) | + | x | ( | 896 | + | x | ) | + | 487 | = | 25088 | + | 28 | x |
| 774 | × | 896 | + | 774 | x | + | x | ( | 896 | + | x | ) | + | 487 | = | 25088 | + | 28 | x |
| 693504 | + | 774 | x | + | x | ( | 896 | + | x | ) | + | 487 | = | 25088 | + | 28 | x |
| 693991 | + | 774 | x | + | x | ( | 896 | + | x | ) | = | 25088 | + | 28 | x |
| 693991 | + | 774 | x | + | x | × | 896 | + | x | x | = | 25088 | + | 28 | x |
| 693991 | + | 1670 | x | + | x | x | = | 25088 | + | 28 | x |