| 500 | + | 6 | × | 4 5 | a | = | 3 2 | a | + | 900 | × | 33 50 | a | + | 500 | × | 2 5 |
| 方程左边 = | 500 | + | 24 5 | a |
| 500 | + | 24 5 | a | = | 3 2 | a | + | 900 | × | 33 50 | a | + | 500 | × | 2 5 |
| 方程右边 = | 3 2 | a | + | 594 | a | + | 200 |
| = | 1191 2 | a | + | 200 |
| 500 | + | 24 5 | a | = | 1191 2 | a | + | 200 |
24 5 | a | − | 1191 2 | a | = | 200 | − | 500 |
| - | 5907 10 | a | = | 200 | − | 500 |
| - | 5907 10 | a | = | - | 300 |
| 300 | = | 5907 10 | a |
5907 10 | a | = | 300 |
| a | = | 300 | ÷ | 5907 10 |
| = | 300 | × | 10 5907 |
| = | 100 | × | 10 1969 |
| a | = | 1000 1969 |
| a | = | 0.507872 |