| ( | 480 | − | x | ) | × | 1 2 | = | ( | 471 | − | x | ) | × | 309 500 |
| 方程左边 = | 480 | × | 1 2 | − | x | × | 1 2 |
| = | 240 | − | x | × | 1 2 |
| 240 | − | 1 2 | x | = | ( | 471 | − | x | ) | × | 309 500 |
| 方程右边 = | 471 | × | 309 500 | − | x | × | 309 500 |
| = | 145539 500 | − | x | × | 309 500 |
| 240 | − | 1 2 | x | = | 145539 500 | − | 309 500 | x |
| - | 1 2 | x | + | 309 500 | x | = | 145539 500 | − | 240 |
59 500 | x | = | 145539 500 | − | 240 |
59 500 | x | = | 25539 500 |
| x | = | 25539 500 | ÷ | 59 500 |
| = | 25539 500 | × | 500 59 |
| = | 25539 | × | 1 59 |
| x | = | 25539 59 |
| x | = | 432.864407 |