| X | ÷ | 200 | + | ( | 451 5 | − | X | ) | ÷ | 255 2 | = | 281 500 |
| 方程左边 = | 1 200 | X | + | 451 5 | × | 2 255 | − | X | × | 2 255 |
| = | 1 200 | X | + | 902 1275 | − | X | × | 2 255 |
| = | - | 29 10200 | X | + | 902 1275 |
| - | 29 10200 | X | + | 902 1275 | = | 281 500 |
| - | 29 10200 | X | = | 281 500 | − | 902 1275 |
| - | 29 10200 | X | = | - | 3709 25500 |
3709 25500 | = | 29 10200 | X |
29 10200 | X | = | 3709 25500 |
| X | = | 3709 25500 | ÷ | 29 10200 |
| = | 3709 25500 | × | 10200 29 |
| = | 3709 5 | × | 2 29 |
| X | = | 7418 145 |
| X | = | 51.158621 |