| 45 | ÷ | 111 | − | 1 5 | − | 9 2 | ÷ | 447 10 | = | 57 20000 | ( | 345 2 | + | X | ) |
| Left side of the equation = | 15 37 | − | 1 5 | − | 15 149 |
| = | 2887 27565 |
2887 27565 | = | 57 20000 | ( | 345 2 | + | X | ) |
| Right side of the equation = | 57 20000 | × | 345 2 | + | 57 20000 | X |
| = | 3933 8000 | + | 57 20000 | X |
2887 27565 | = | 3933 8000 | + | 57 20000 | X |
| - | 57 20000 | X | = | 3933 8000 | − | 2887 27565 |
| - | 57 20000 | X | = | 17063429 44104000 |
| - | 17063429 44104000 | = | 57 20000 | X |
57 20000 | X | = | - | 17063429 44104000 |
| X | = | - | 17063429 44104000 | ÷ | 57 20000 |
| = | - | 17063429 44104000 | × | 20000 57 |
| = | - | 17063429 11026 | × | 5 57 |
| X | = | - | 85317145 628482 |
| X | = | - 135.751135 |