| ( | ( | 6637761 100 | + | a | + | 843 | + | 8000 | ) | − | 40000 | − | 6744 | ) | × | 3 100 | = | 24811 50 | + | a |
| 方程左边 = | ( | 6637761 100 | + | a | + | 843 | + | 8000 | ) | × | 3 100 | − | 40000 | × | 3 100 | − | 6744 | × | 3 100 |
| = | ( | 6637761 100 | + | a | + | 843 | + | 8000 | ) | × | 3 100 | − | 1200 | − | 5058 25 |
| = | ( | 6637761 100 | + | a | + | 843 | + | 8000 | ) | × | 3 100 | − | 35058 25 |
| = | 6637761 100 | × | 3 100 | + | a | × | 3 100 | + | 843 | × | 3 100 | + | 8000 | × | 3 100 | − | 35058 25 |
| = | 19913283 10000 | + | a | × | 3 100 | + | 2529 100 | + | 240 | − | 35058 25 |
| = | 8542983 10000 | + | 3 100 | a |
8542983 10000 | + | 3 100 | a | = | 24811 50 | + | a |
3 100 | a | − | a | = | 24811 50 | − | 8542983 10000 |
| - | 97 100 | a | = | 24811 50 | − | 8542983 10000 |
| - | 97 100 | a | = | - | 3580783 10000 |
3580783 10000 | = | 97 100 | a |
97 100 | a | = | 3580783 10000 |
| a | = | 3580783 10000 | ÷ | 97 100 |
| = | 3580783 10000 | × | 100 97 |
| = | 3580783 100 | × | 1 97 |
| a | = | 3580783 9700 |
| a | = | 369.152887 |