| 8000 | ( | x | − | 850 | ) | = | 7000 | ( | x | − | 60 | ) |
| Left side of the equation = | 8000 | x | − | 8000 | × | 850 |
| = | 8000 | x | − | 6800000 |
| 8000 | x | − | 6800000 | = | 7000 | ( | x | − | 60 | ) |
| Right side of the equation = | 7000 | x | − | 7000 | × | 60 |
| = | 7000 | x | − | 420000 |
| 8000 | x | − | 6800000 | = | 7000 | x | − | 420000 |
| 8000 | x | − | 7000 | x | = | - | 420000 | + | 6800000 |
| 1000 | x | = | - | 420000 | + | 6800000 |
| 1000 | x | = | 6380000 |
| x | = | 6380000 | ÷ | 1000 |
| = | 6380000 | × | 1 1000 |
| = | 6380 | × | 1 |
| x | = | 6380 |