| 10 | x | + | ( | 5 | − | x | ) | × | 10 | ( | 5 | − | x | ) | + | x | = | 736 |
| 方程左边 = | 11 | x | + | ( | 5 | − | x | ) | × | 10 | ( | 5 | − | x | ) |
| 11 | x | + | ( | 5 | − | x | ) | × | 10 | ( | 5 | − | x | ) | = | 736 |
| 方程左边 = | 11 | x | + | 5 | × | 10 | ( | 5 | − | x | ) | − | x | × | 10 | ( | 5 | − | x | ) |
| = | 11 | x | + | 50 | ( | 5 | − | x | ) | − | x | × | 10 | ( | 5 | − | x | ) |
| = | 11 | x | + | 50 | × | 5 | − | 50 | x | − | x | × | 10 | ( | 5 | − | x | ) |
| = | 11 | x | + | 250 | − | 50 | x | − | x | × | 10 | ( | 5 | − | x | ) |
| = | - | 39 | x | + | 250 | − | x | × | 10 | ( | 5 | − | x | ) |
| = | - | 39 | x | + | 250 | − | x | × | 10 | × | 5 | + | x | × | 10 | x |
| = | - | 39 | x | + | 250 | − | x | × | 50 | + | x | × | 10 | x |
| = | - | 89 | x | + | 250 | + | x | × | 10 | x |
| - | 89 | x | + | 250 | + | x | × | 10 | x | = | 736 |