| 35000 | + | 15000 | + | 199 10 | a | × | 7 20 | = | a | × | 199 10 |
| Left side of the equation = | 35000 | + | 15000 | + | 1393 200 | a |
| = | 50000 | + | 1393 200 | a |
| 50000 | + | 1393 200 | a | = | a | × | 199 10 |
1393 200 | a | − | 199 10 | a | = | - | 50000 |
| - | 2587 200 | a | = | - | 50000 |
| 50000 | = | 2587 200 | a |
2587 200 | a | = | 50000 |
| a | = | 50000 | ÷ | 2587 200 |
| = | 50000 | × | 200 2587 |
| a | = | 10000000 2587 |
| a | = | 3865.481252 |