| 104 | a | − | 50 | ( | 1 | + | 2 | × | a% | ) | ( | 1 | + | a% | ) | − | 10 | = | 0 |
| 方程左边 = | 104 | a | − | 50 | × | 1 | ( | 1 | + | a% | ) | − | 50 | × | 2 | × | a% | ( | 1 | + | a% | ) | − | 10 |
| = | 104 | a | − | 50 | ( | 1 | + | a% | ) | − | 1 | a | ( | 1 | + | a% | ) | − | 10 |
| = | 104 | a | − | 50 | × | 1 | − | 50 | × | a% | − | 1 | a | ( | 1 | + | a% | ) | − | 10 |
| = | 104 | a | − | 50 | − | 1 2 | a | − | 1 | a | ( | 1 | + | a% | ) | − | 10 |
| = | 207 2 | a | − | 60 | − | 1 | a | ( | 1 | + | a% | ) |
| = | 207 2 | a | − | 60 | − | 1 | a | × | 1 | − | 1 | a | × | a% |
| = | 207 2 | a | − | 60 | − | 1 | a | − | 1 100 | a | a |
| = | 205 2 | a | − | 60 | − | 1 100 | a | a |
205 2 | a | − | 60 | − | 1 100 | a | a | = | 0 |