| 108 | × | 1000000 | = | 1 | × | 143 10 | × | 200 | ( | x | ) | ( | 465 | − | x | ÷ | 2 | ) |
| 方程左边 = | 108000000 |
| 108000000 | = | 1 | × | 143 10 | × | 200 | ( | x | ) | ( | 465 | − | x | ÷ | 2 | ) |
| 方程右边 = | 2860 | ( | x | ) | ( | 465 | − | x | ÷ | 2 | ) |
| 108000000 | = | 2860 | ( | x | ) | ( | 465 | − | x | ÷ | 2 | ) |
| 方程右边 = | 2860 | x | ( | 465 | − | x | ÷ | 2 | ) |
| = | 2860 | x | × | 465 | − | 2860 | x | x | ÷ | 2 |
| = | 1329900 | x | − | 1430 | x | x |
| 108000000 | = | 1329900 | x | − | 1430 | x | x |