| ( | 750 | − | x | ) | ( | 7 10 | + | 29 50000 | ( | ( | 750 | + | x | ) | ÷ | 2 | ) | ) | = | 484251 50000 |
| 方程左边 = | 750 | ( | 7 10 | + | 29 50000 | ( | ( | 750 | + | x | ) | ÷ | 2 | ) | ) | − | x | ( | 7 10 | + | 29 50000 | ( | ( | 750 | + | x | ) | ÷ | 2 | ) | ) |
| = | 750 | × | 7 10 | + | 750 | × | 29 50000 | ( | ( | 750 | + | x | ) | ÷ | 2 | ) | − | x | ( | 7 10 | + | 29 50000 | ( | ( | 750 | + | x | ) | ÷ | 2 | ) | ) |
| = | 525 | + | 87 200 | ( | ( | 750 | + | x | ) | ÷ | 2 | ) | − | x | ( | 7 10 | + | 29 50000 | ( | ( | 750 | + | x | ) | ÷ | 2 | ) | ) |
| = | 525 | + | 87 200 | ( | 750 | + | x | ) | ÷ | 2 | − | x | ( | 7 10 | + | 29 50000 | ( | ( | 750 | + | x | ) | ÷ | 2 | ) | ) |
| = | 525 | + | 87 400 | ( | 750 | + | x | ) | − | x | ( | 7 10 | + | 29 50000 | ( | ( | 750 | + | x | ) | ÷ | 2 | ) | ) |
| = | 525 | + | 87 400 | × | 750 | + | 87 400 | x | − | x | ( | 7 10 | + | 29 50000 | ( | ( | 750 | + | x | ) | ÷ | 2 | ) | ) |
| = | 525 | + | 1305 8 | + | 87 400 | x | − | x | ( | 7 10 | + | 29 50000 | ( | ( | 750 | + | x | ) | ÷ | 2 | ) | ) |
| = | 5505 8 | + | 87 400 | x | − | x | ( | 7 10 | + | 29 50000 | ( | ( | 750 | + | x | ) | ÷ | 2 | ) | ) |
| = | 5505 8 | + | 87 400 | x | − | x | × | 7 10 | − | x | × | 29 50000 | ( | ( | 750 | + | x | ) | ÷ | 2 | ) |
| = | 5505 8 | − | 193 400 | x | − | x | × | 29 50000 | ( | ( | 750 | + | x | ) | ÷ | 2 | ) |
| = | 5505 8 | − | 193 400 | x | − | x | × | 29 50000 | ( | 750 | + | x | ) | ÷ | 2 |
| = | 5505 8 | − | 193 400 | x | − | x | × | 29 100000 | ( | 750 | + | x | ) |
| = | 5505 8 | − | 193 400 | x | − | x | × | 29 100000 | × | 750 | − | x | × | 29 100000 | x |
| = | 5505 8 | − | 193 400 | x | − | x | × | 87 400 | − | x | × | 29 100000 | x |
| = | 5505 8 | − | 7 10 | x | − | x | × | 29 100000 | x |
5505 8 | − | 7 10 | x | − | x | × | 29 100000 | x | = | 484251 50000 |