| ( | ( | 8000 | a | + | 843 | + | 8000 | ) | − | 5000 | − | 843 | ) | × | 3 100 | − | 2520 | = | a |
| Left side of the equation = | ( | 8000 | a | + | 843 | + | 8000 | ) | × | 3 100 | − | 5000 | × | 3 100 | − | 843 | × | 3 100 | − | 2520 |
| = | ( | 8000 | a | + | 843 | + | 8000 | ) | × | 3 100 | − | 150 | − | 2529 100 | − | 2520 |
| = | ( | 8000 | a | + | 843 | + | 8000 | ) | × | 3 100 | − | 269529 100 |
| = | 8000 | a | × | 3 100 | + | 843 | × | 3 100 | + | 8000 | × | 3 100 | − | 269529 100 |
| = | 240 | a | + | 2529 100 | + | 240 | − | 269529 100 |
| = | 240 | a | − | 2430 |
| 240 | a | − | 2430 | = | a |
| 240 | a | − | a | = | 2430 |
| 239 | a | = | 2430 |
| a | = | 2430 | ÷ | 239 |
| = | 2430 | × | 1 239 |
| a | = | 2430 239 |
| a | = | 10.167364 |