28 5 | x | + | ( | ( | 5000 | − | x | ) | × | 31 5 | ) | = | 1478 5 |
| Left side of the equation = | 28 5 | x | + | ( | 5000 | − | x | ) | × | 31 5 |
| = | 28 5 | x | + | 5000 | × | 31 5 | − | x | × | 31 5 |
| = | 28 5 | x | + | 31000 | − | x | × | 31 5 |
| = | - | 3 5 | x | + | 31000 |
| - | 3 5 | x | + | 31000 | = | 1478 5 |
| - | 3 5 | x | = | 1478 5 | − | 31000 |
| - | 3 5 | x | = | - | 153522 5 |
153522 5 | = | 3 5 | x |
3 5 | x | = | 153522 5 |
| x | = | 153522 5 | ÷ | 3 5 |
| = | 153522 5 | × | 5 3 |
| = | 51174 | × | 1 |
| x | = | 51174 |