| ( | ( | 319073 25 | + | a | + | 843 | + | 8000 | ) | − | 15000 | − | 843 | ) | × | 3 100 | = | 3231 100 | + | a |
| Left side of the equation = | ( | 319073 25 | + | a | + | 843 | + | 8000 | ) | × | 3 100 | − | 15000 | × | 3 100 | − | 843 | × | 3 100 |
| = | ( | 319073 25 | + | a | + | 843 | + | 8000 | ) | × | 3 100 | − | 450 | − | 2529 100 |
| = | ( | 319073 25 | + | a | + | 843 | + | 8000 | ) | × | 3 100 | − | 47529 100 |
| = | 319073 25 | × | 3 100 | + | a | × | 3 100 | + | 843 | × | 3 100 | + | 8000 | × | 3 100 | − | 47529 100 |
| = | 957219 2500 | + | a | × | 3 100 | + | 2529 100 | + | 240 | − | 47529 100 |
| = | 432219 2500 | + | 3 100 | a |
432219 2500 | + | 3 100 | a | = | 3231 100 | + | a |
3 100 | a | − | a | = | 3231 100 | − | 432219 2500 |
| - | 97 100 | a | = | 3231 100 | − | 432219 2500 |
| - | 97 100 | a | = | - | 87861 625 |
87861 625 | = | 97 100 | a |
97 100 | a | = | 87861 625 |
| a | = | 87861 625 | ÷ | 97 100 |
| = | 87861 625 | × | 100 97 |
| = | 87861 25 | × | 4 97 |
| a | = | 351444 2425 |
| a | = | 144.925361 |