211 50 | × | 51 10 | ÷ | 2640 | × | x | + | 33 20 | = | 8403 5000 |
| 方程左边 = | 3587 440000 | x | + | 33 20 |
3587 440000 | x | + | 33 20 | = | 8403 5000 |
3587 440000 | x | = | 8403 5000 | − | 33 20 |
3587 440000 | x | = | 153 5000 |
| x | = | 153 5000 | ÷ | 3587 440000 |
| = | 153 5000 | × | 440000 3587 |
| = | 153 | × | 88 3587 |
| x | = | 13464 3587 |
| x | = | 792 211 |
| x | = | 3.753555 |