| 719 | × | 10000 | = | 92 5 | × | 2000 | ( | 6188 | − | x | ÷ | 2 | ) |
| 方程左边 = | 7190000 |
| 7190000 | = | 92 5 | × | 2000 | ( | 6188 | − | x | ÷ | 2 | ) |
| 方程右边 = | 36800 | ( | 6188 | − | x | ÷ | 2 | ) |
| 7190000 | = | 36800 | ( | 6188 | − | x | ÷ | 2 | ) |
| 方程右边 = | 36800 | × | 6188 | − | 36800 | x | ÷ | 2 |
| = | 227718400 | − | 18400 | x |
| 7190000 | = | 227718400 | − | 18400 | x |
| 18400 | x | = | 227718400 | − | 7190000 |
| 18400 | x | = | 220528400 |
| x | = | 220528400 | ÷ | 18400 |
| = | 220528400 | × | 1 18400 |
| = | 551321 | × | 1 46 |
| x | = | 551321 46 |
| x | = | 11985.23913 |