| 800 | + | 2 5 | ( | x | − | 2000 | ) | = | 2400 | + | 1 5 | ( | x | − | 2000 | ) |
| Left side of the equation = | 800 | + | 2 5 | x | − | 2 5 | × | 2000 |
| = | 800 | + | 2 5 | x | − | 800 |
| = | 0 | + | 2 5 | x |
| 0 | + | 2 5 | x | = | 2400 | + | 1 5 | ( | x | − | 2000 | ) |
| Right side of the equation = | 2400 | + | 1 5 | x | − | 1 5 | × | 2000 |
| = | 2400 | + | 1 5 | x | − | 400 |
| = | 2000 | + | 1 5 | x |
2 5 | x | = | 2000 | + | 1 5 | x |
2 5 | x | − | 1 5 | x | = | 2000 |
1 5 | x | = | 2000 |
| x | = | 2000 | ÷ | 1 5 |
| = | 2000 | × | 5 |
| x | = | 10000 |