143 10 | × | 250 | x | ( | 460 | − | x | ÷ | 2 | ) | − | 125000000 | = | 0 |
| 方程左边 = | 3575 | x | ( | 460 | − | x | ÷ | 2 | ) | − | 125000000 |
| 3575 | x | ( | 460 | − | x | ÷ | 2 | ) | − | 125000000 | = | 0 |
| 方程左边 = | 3575 | x | × | 460 | − | 3575 | x | x | ÷ | 2 | − | 125000000 |
| = | 1644500 | x | − | 3575 2 | x | x | − | 125000000 |
| 1644500 | x | − | 3575 2 | x | x | − | 125000000 | = | 0 |