| ( | 162 5 | + | x | ) | ( | 500 | − | 2 | x | ) | = | 6000 |
| Left side of the equation = | 162 5 | ( | 500 | − | 2 | x | ) | + | x | ( | 500 | − | 2 | x | ) |
| = | 162 5 | × | 500 | − | 162 5 | × | 2 | x | + | x | ( | 500 | − | 2 | x | ) |
| = | 16200 | − | 324 5 | x | + | x | ( | 500 | − | 2 | x | ) |
| = | 16200 | − | 324 5 | x | + | x | × | 500 | − | x | × | 2 | x |
| = | 16200 | + | 2176 5 | x | − | x | × | 2 | x |
| 16200 | + | 2176 5 | x | − | x | × | 2 | x | = | 6000 |