| 566750 | × | 255 | = | 231 10 | × | 1000 | x | ( | 300 | − | x | ÷ | 2 | ) | + | 360 | × | 2835 4 | ( | 300 | − | 50 | ) |
| 方程左边 = | 144521250 |
| 144521250 | = | 231 10 | × | 1000 | x | ( | 300 | − | x | ÷ | 2 | ) | + | 360 | × | 2835 4 | ( | 300 | − | 50 | ) |
| 方程右边 = | 23100 | x | ( | 300 | − | x | ÷ | 2 | ) | + | 255150 | ( | 300 | − | 50 | ) |
| 144521250 | = | 23100 | x | ( | 300 | − | x | ÷ | 2 | ) | + | 255150 | ( | 300 | − | 50 | ) |
| 方程右边 = | 23100 | x | × | 300 | − | 23100 | x | x | ÷ | 2 | + | 255150 | ( | 300 | − | 50 | ) |
| = | 6930000 | x | − | 11550 | x | x | + | 255150 | ( | 300 | − | 50 | ) |
| = | 6930000 | x | − | 11550 | x | x | + | 255150 | × | 300 | − | 255150 | × | 50 |
| = | 6930000 | x | − | 11550 | x | x | + | 76545000 | − | 12757500 |
| = | 6930000 | x | − | 11550 | x | x | + | 63787500 |
| 144521250 | = | 6930000 | x | − | 11550 | x | x | + | 63787500 |