| 3 | = | 5329 100 | a | + | 73 10 | ( | 4 | ÷ | 9 | − | 4 | a | ) | + | 20 | ÷ | 9 |
| 方程右边 = | 5329 100 | a | + | 73 10 | ( | 4 | ÷ | 9 | − | 4 | a | ) | + | 20 9 |
| 3 | = | 5329 100 | a | + | 73 10 | ( | 4 | ÷ | 9 | − | 4 | a | ) | + | 20 9 |
| 方程右边 = | 5329 100 | a | + | 73 10 | × | 4 | ÷ | 9 | − | 73 10 | × | 4 | a | + | 20 9 |
| = | 5329 100 | a | + | 146 45 | − | 146 5 | a | + | 20 9 |
| = | 2409 100 | a | + | 82 15 |
| 3 | = | 2409 100 | a | + | 82 15 |
| - | 2409 100 | a | = | 82 15 | − | 3 |
| - | 2409 100 | a | = | 37 15 |
| - | 37 15 | = | 2409 100 | a |
2409 100 | a | = | - | 37 15 |
| a | = | - | 37 15 | ÷ | 2409 100 |
| = | - | 37 15 | × | 100 2409 |
| = | - | 37 3 | × | 20 2409 |
| a | = | - | 740 7227 |
| a | = | - 0.102394 |