| 3 | ( | 1 | + | a | ÷ | 100 | ) | + | 2 | ( | 1 | + | 3 | a | ÷ | 100 | ) | ( | 1 | − | a | ÷ | 100 | ) | = | 5 | ( | 1 | + | 29 | a | ÷ | 2500 | ) |
| 方程左边 = | 3 | × | 1 | + | 3 | a | ÷ | 100 | + | 2 | ( | 1 | + | 3 | a | ÷ | 100 | ) | ( | 1 | − | a | ÷ | 100 | ) |
| = | 3 | + | 3 100 | a | + | 2 | ( | 1 | + | 3 | a | ÷ | 100 | ) | ( | 1 | − | a | ÷ | 100 | ) |
| = | 3 | + | 3 100 | a | + | 2 | × | 1 | ( | 1 | − | a | ÷ | 100 | ) | + | 2 | × | 3 | a | ÷ | 100 | × | ( | 1 | − | a | ÷ | 100 | ) |
| = | 3 | + | 3 100 | a | + | 2 | ( | 1 | − | a | ÷ | 100 | ) | + | 3 50 | a | ( | 1 | − | a | ÷ | 100 | ) |
| = | 3 | + | 3 100 | a | + | 2 | × | 1 | − | 2 | a | ÷ | 100 | + | 3 50 | a | ( | 1 | − | a | ÷ | 100 | ) |
| = | 3 | + | 3 100 | a | + | 2 | − | 1 50 | a | + | 3 50 | a | ( | 1 | − | a | ÷ | 100 | ) |
| = | 5 | + | 1 100 | a | + | 3 50 | a | ( | 1 | − | a | ÷ | 100 | ) |
| = | 5 | + | 1 100 | a | + | 3 50 | a | × | 1 | − | 3 50 | a | a | ÷ | 100 |
| = | 5 | + | 1 100 | a | + | 3 50 | a | − | 3 5000 | a | a |
| = | 5 | + | 7 100 | a | − | 3 5000 | a | a |
| 5 | + | 7 100 | a | − | 3 5000 | a | a | = | 5 | ( | 1 | + | 29 | a | ÷ | 2500 | ) |
| 方程右边 = | 5 | × | 1 | + | 5 | × | 29 | a | ÷ | 2500 |
| = | 5 | + | 29 500 | a |
| 5 | + | 7 100 | a | − | 3 5000 | a | a | = | 5 | + | 29 500 | a |