| ( | ( | 100 | − | x | ) | × | 75 | ) | − | ( | ( | 94 | − | x | ) | ( | 75 | + | 24 | ) | ) | = | 126 |
| 方程左边 = | ( | 100 | − | x | ) | × | 75 | − | ( | ( | 94 | − | x | ) | ( | 75 | + | 24 | ) | ) |
| = | 100 | × | 75 | − | x | × | 75 | − | ( | ( | 94 | − | x | ) | ( | 75 | + | 24 | ) | ) |
| = | 7500 | − | x | × | 75 | − | ( | ( | 94 | − | x | ) | ( | 75 | + | 24 | ) | ) |
| = | 7500 | − | 75 | x | − | ( | 94 | − | x | ) | ( | 75 | + | 24 | ) |
| = | 7500 | − | 75 | x | − | 94 | ( | 75 | + | 24 | ) | + | x | ( | 75 | + | 24 | ) |
| = | 7500 | − | 75 | x | − | 94 | × | 75 | − | 94 | × | 24 | + | x | ( | 75 | + | 24 | ) |
| = | 7500 | − | 75 | x | − | 7050 | − | 2256 | + | x | ( | 75 | + | 24 | ) |
| = | - | 1806 | − | 75 | x | + | x | ( | 75 | + | 24 | ) |
| = | - | 1806 | − | 75 | x | + | x | × | 75 | + | x | × | 24 |
| = | - | 1806 | + | 24 | x |
| - | 1806 | + | 24 | x | = | 126 |
| 24 | x | = | 126 | + | 1806 |
| 24 | x | = | 1932 |
| x | = | 1932 | ÷ | 24 |
| = | 1932 | × | 1 24 |
| = | 161 | × | 1 2 |
| x | = | 161 2 |
| x | = | 80.5 |