| 400 | − | 1 1250 | x | − | 687 50 | − | 500000 | = | 0 |
| Left side of the equation = | - | 24980687 50 | − | 1 1250 | x |
| - | 24980687 50 | − | 1 1250 | x | = | 0 |
| - | 1 1250 | x | = | 0 | + | 24980687 50 |
| - | 1 1250 | x | = | 24980687 50 |
| - | 24980687 50 | = | 1 1250 | x |
1 1250 | x | = | - | 24980687 50 |
| x | = | - | 24980687 50 | ÷ | 1 1250 |
| = | - | 24980687 50 | × | 1250 |
| = | - | 24980687 | × | 25 |
| x | = | - | 624517175 |