| ( | x | − | 50 | ) | ( | x | − | 50 | ) | ÷ | 600 | − | ( | x | − | 150 | ) | ( | x | − | 150 | ) | ÷ | 200 | = | 1083 625 |
| 方程左边 = | x | ( | x | − | 50 | ) | × | 1 600 | − | 50 | ( | x | − | 50 | ) | × | 1 600 | − | ( | x | − | 150 | ) | ( | x | − | 150 | ) | × | 1 200 |
| = | x | ( | x | − | 50 | ) | × | 1 600 | − | 1 12 | ( | x | − | 50 | ) | − | ( | x | − | 150 | ) | ( | x | − | 150 | ) | × | 1 200 |
| = | x | x | × | 1 600 | − | x | × | 50 | × | 1 600 | − | 1 12 | ( | x | − | 50 | ) | − | ( | x | − | 150 | ) | ( | x | − | 150 | ) | × | 1 200 |
| = | x | x | × | 1 600 | − | x | × | 1 12 | − | 1 12 | ( | x | − | 50 | ) | − | ( | x | − | 150 | ) | ( | x | − | 150 | ) | × | 1 200 |
| = | x | x | × | 1 600 | − | 1 12 | x | − | 1 12 | x | + | 1 12 | × | 50 | − | ( | x | − | 150 | ) | ( | x | − | 150 | ) | × | 1 200 |
| = | x | x | × | 1 600 | − | 1 12 | x | − | 1 12 | x | + | 25 6 | − | ( | x | − | 150 | ) | ( | x | − | 150 | ) | × | 1 200 |
| = | x | x | × | 1 600 | − | 1 6 | x | + | 25 6 | − | ( | x | − | 150 | ) | ( | x | − | 150 | ) | × | 1 200 |
| = | x | x | × | 1 600 | − | 1 6 | x | + | 25 6 | − | x | ( | x | − | 150 | ) | × | 1 200 | + | 150 | ( | x | − | 150 | ) | × | 1 200 |
| = | x | x | × | 1 600 | − | 1 6 | x | + | 25 6 | − | x | ( | x | − | 150 | ) | × | 1 200 | + | 3 4 | ( | x | − | 150 | ) |
| = | x | x | × | 1 600 | − | 1 6 | x | + | 25 6 | − | x | x | × | 1 200 | + | x | × | 150 | × | 1 200 |
| = | x | x | × | 1 600 | − | 1 6 | x | + | 25 6 | − | x | x | × | 1 200 | + | x | × | 3 4 | + | 3 4 |
| = | x | x | × | 1 600 | + | 7 12 | x | + | 25 6 | − | x | x | × | 1 200 | + | 3 4 | ( | x | − | 150 | ) |
| = | x | x | × | 1 600 | + | 7 12 | x | + | 25 6 | − | x | x | × | 1 200 | + | 3 4 | x | − | 3 4 |
| = | x | x | × | 1 600 | + | 7 12 | x | + | 25 6 | − | x | x | × | 1 200 | + | 3 4 | x | − | 225 2 |
| = | x | x | × | 1 600 | + | 4 3 | x | − | 325 3 | − | x | x | × | 1 200 |
| x | x | × | 1 600 | + | 4 3 | x | − | 325 3 | − | x | x | × | 1 200 | = | 1083 625 |