| ( | 5 4 | + | 3 10000 | x | ) | ( | 1500 | − | x | ) | ÷ | 2 5 | = | ( | 63 200 | + | 3 20000 | x | ) | ( | x | − | 100 | ) | ÷ | 1 5 |
| 方程左边 = | 5 4 | ( | 1500 | − | x | ) | × | 5 2 | + | 3 10000 | x | ( | 1500 | − | x | ) | × | 5 2 |
| = | 25 8 | ( | 1500 | − | x | ) | + | 3 4000 | x | ( | 1500 | − | x | ) |
| = | 25 8 | × | 1500 | − | 25 8 | x | + | 3 4000 | x | ( | 1500 | − | x | ) |
| = | 9375 2 | − | 25 8 | x | + | 3 4000 | x | ( | 1500 | − | x | ) |
| = | 9375 2 | − | 25 8 | x | + | 3 4000 | x | × | 1500 | − | 3 4000 | x | x |
| = | 9375 2 | − | 25 8 | x | + | 9 8 | x | − | 3 4000 | x | x |
| = | 9375 2 | − | 2 | x | − | 3 4000 | x | x |
9375 2 | − | 2 | x | − | 3 4000 | x | x | = | ( | 63 200 | + | 3 20000 | x | ) | ( | x | − | 100 | ) | ÷ | 1 5 |
| 方程右边 = | 63 200 | ( | x | − | 100 | ) | × | 5 | + | 3 20000 | x | ( | x | − | 100 | ) | × | 5 |
| = | 63 40 | ( | x | − | 100 | ) | + | 3 4000 | x | ( | x | − | 100 | ) |
| = | 63 40 | x | − | 63 40 | × | 100 | + | 3 4000 | x | ( | x | − | 100 | ) |
| = | 63 40 | x | − | 315 2 | + | 3 4000 | x | ( | x | − | 100 | ) |
| = | 63 40 | x | − | 315 2 | + | 3 4000 | x | x | − | 3 4000 | x | × | 100 |
| = | 63 40 | x | − | 315 2 | + | 3 4000 | x | x | − | 3 40 | x |
| = | 3 2 | x | − | 315 2 | + | 3 4000 | x | x |
9375 2 | − | 2 | x | − | 3 4000 | x | x | = | 3 2 | x | − | 315 2 | + | 3 4000 | x | x |