| 7 | ÷ | ( | 1 | − | ( | 1 | ÷ | 577121 1000000 | ) | x | ) | = | 1 5 |
| Multiply both sides of the equation by: | ( | 1 | − | ( | 1 | ÷ | 577121 1000000 | ) | x | ) |
| 7 | = | 1 5 | ( | 1 | − | ( | 1 | ÷ | 577121 1000000 | ) | x | ) |
| 7 | = | 1 5 | × | 1 | − | 1 5 | ( | 1 | ÷ | 577121 1000000 | ) | x |
| 7 | = | 1 5 | − | 1 5 | ( | 1 | ÷ | 577121 1000000 | ) | x |
| 7 | = | 1 5 | − | 1 5 | × | 1 | ÷ | 577121 1000000 | × | x |
| 7 | = | 1 5 | − | 200000 577121 | x |
200000 577121 | x | = | 1 5 | − | 7 |
200000 577121 | x | = | - | 34 5 |
| x | = | - | 34 5 | ÷ | 200000 577121 |
| = | - | 34 5 | × | 577121 200000 |
| = | - | 17 5 | × | 577121 100000 |
| x | = | - | 9811057 500000 |
| x | = | - 19.622114 |