| ( | 200 | − | 4 | x | ) | ( | 20 | + | x | ) | = | 2024 |
| Left side of the equation = | 200 | ( | 20 | + | x | ) | − | 4 | x | ( | 20 | + | x | ) |
| = | 200 | × | 20 | + | 200 | x | − | 4 | x | ( | 20 | + | x | ) |
| = | 4000 | + | 200 | x | − | 4 | x | ( | 20 | + | x | ) |
| = | 4000 | + | 200 | x | − | 4 | x | × | 20 | − | 4 | x | x |
| = | 4000 | + | 200 | x | − | 80 | x | − | 4 | x | x |
| = | 4000 | + | 120 | x | − | 4 | x | x |
| 4000 | + | 120 | x | − | 4 | x | x | = | 2024 |