| 28 | ( | 32 | x | + | 34 | ) | − | 17613 | = | 18 | x | + | 21 |
| Left side of the equation = | 28 | × | 32 | x | + | 28 | × | 34 | − | 17613 |
| = | 896 | x | + | 952 | − | 17613 |
| = | 896 | x | − | 16661 |
| 896 | x | − | 16661 | = | 18 | x | + | 21 |
| 896 | x | − | 18 | x | = | 21 | + | 16661 |
| 878 | x | = | 21 | + | 16661 |
| 878 | x | = | 16682 |
| x | = | 16682 | ÷ | 878 |
| = | 16682 | × | 1 878 |
| = | 8341 | × | 1 439 |
| x | = | 8341 439 |
| x | = | 19 |