| 30 | ÷ | 50 | = | ( | X | − | 4540 | ) | ÷ | 60 |
| Left side of the equation = | 3 5 |
3 5 | = | ( | X | − | 4540 | ) | ÷ | 60 |
| Right side of the equation = | X | × | 1 60 | − | 4540 | × | 1 60 |
| = | X | × | 1 60 | − | 227 3 |
3 5 | = | 1 60 | X | − | 227 3 |
| - | 1 60 | X | = | - | 227 3 | − | 3 5 |
| - | 1 60 | X | = | - | 1144 15 |
1144 15 | = | 1 60 | X |
1 60 | X | = | 1144 15 |
| X | = | 1144 15 | ÷ | 1 60 |
| = | 1144 15 | × | 60 |
| = | 1144 | × | 4 |
| X | = | 4576 |