| ( | x | + | 7 10 | ÷ | 4300 | ) | × | 82000 | + | 7 10 | = | 15 |
| 方程左边 = | x | × | 82000 | + | 7 10 | ÷ | 4300 | × | 82000 | + | 7 10 |
| = | x | × | 82000 | + | 574 43 | + | 7 10 |
| = | 82000 | x | + | 6041 430 |
| 82000 | x | + | 6041 430 | = | 15 |
| 82000 | x | = | 15 | − | 6041 430 |
| 82000 | x | = | 409 430 |
| x | = | 409 430 | ÷ | 82000 |
| = | 409 430 | × | 1 82000 |
| x | = | 409 35260000 |
| x | = | 0.000012 |