| 566550000 | = | 143 10 | × | 400 | × | 60 | × | 405 | + | 143 10 | × | 200 | x | ( | 435 | − | 1 2 | x | ) |
| 方程右边 = | 138996000 | + | 2860 | x | ( | 435 | − | 1 2 | x | ) |
| 566550000 | = | 138996000 | + | 2860 | x | ( | 435 | − | 1 2 | x | ) |
| 方程右边 = | 138996000 | + | 2860 | x | × | 435 | − | 2860 | x | × | 1 2 | x |
| = | 138996000 | + | 1244100 | x | − | 1430 | x | x |
| 566550000 | = | 138996000 | + | 1244100 | x | − | 1430 | x | x |