| 400 | − | 1 1250 | x | − | 687 50 | = | 0 |
| Left side of the equation = | 19313 50 | − | 1 1250 | x |
19313 50 | − | 1 1250 | x | = | 0 |
| - | 1 1250 | x | = | 0 | − | 19313 50 |
| - | 1 1250 | x | = | - | 19313 50 |
19313 50 | = | 1 1250 | x |
1 1250 | x | = | 19313 50 |
| x | = | 19313 50 | ÷ | 1 1250 |
| = | 19313 50 | × | 1250 |
| = | 19313 | × | 25 |
| x | = | 482825 |