| 5 | x | × | 16 | + | ( | 16 | − | x | ) | × | 4 | × | 24 | = | 1440 |
| 方程左边 = | 80 | x | + | ( | 16 | − | x | ) | × | 96 |
| 80 | x | + | ( | 16 | − | x | ) | × | 96 | = | 1440 |
| 方程左边 = | 80 | x | + | 16 | × | 96 | − | x | × | 96 |
| = | 80 | x | + | 1536 | − | x | × | 96 |
| = | - | 16 | x | + | 1536 |
| - | 16 | x | + | 1536 | = | 1440 |
| - | 16 | x | = | 1440 | − | 1536 |
| - | 16 | x | = | - | 96 |
| 96 | = | 16 | x |
| 16 | x | = | 96 |
| x | = | 96 | ÷ | 16 |
| = | 96 | × | 1 16 |
| = | 6 | × | 1 |
| x | = | 6 |