1 25 | ( | 613 100 | + | 151 50 | − | X | ) | × | 25 | ÷ | 50 | × | 1000 | = | 0 |
| Left side of the equation = | 20 | ( | 613 100 | + | 151 50 | − | X | ) |
| 20 | ( | 613 100 | + | 151 50 | − | X | ) | = | 0 |
| Left side of the equation = | 20 | × | 613 100 | + | 20 | × | 151 50 | − | 20 | X |
| = | 613 5 | + | 302 5 | − | 20 | X |
| = | 183 | − | 20 | X |
| 183 | − | 20 | X | = | 0 |
| - | 20 | X | = | 0 | − | 183 |
| - | 20 | X | = | - | 183 |
| 183 | = | 20 | X |
| 20 | X | = | 183 |
| X | = | 183 | ÷ | 20 |
| = | 183 | × | 1 20 |
| X | = | 183 20 |
| X | = | 9.15 |