| 1000 | x | − | 10000 | x | × | 5 100 | − | ( | 200 | × | 10000 | + | 580000 | ) | = | 0 |
| Left side of the equation = | 1000 | x | − | 500 | x | − | ( | 200 | × | 10000 | + | 580000 | ) |
| = | 500 | x | − | ( | 200 | × | 10000 | + | 580000 | ) |
| 500 | x | − | ( | 200 | × | 10000 | + | 580000 | ) | = | 0 |
| Left side of the equation = | 500 | x | − | 200 | × | 10000 | − | 580000 |
| = | 500 | x | − | 2000000 | − | 580000 |
| = | 500 | x | − | 2580000 |
| 500 | x | − | 2580000 | = | 0 |
| 500 | x | = | 0 | + | 2580000 |
| 500 | x | = | 2580000 |
| x | = | 2580000 | ÷ | 500 |
| = | 2580000 | × | 1 500 |
| = | 5160 | × | 1 |
| x | = | 5160 |