3 10 | ( | 1 | − | x | ) | ( | 1 4 | − | 3 10 | x | ) | = | 5 8 | ( | 1 10 | + | 3 10 | x | ) |
| 方程左边 = | 3 10 | × | 1 | ( | 1 4 | − | 3 10 | x | ) | − | 3 10 | x | ( | 1 4 | − | 3 10 | x | ) |
| = | 3 10 | ( | 1 4 | − | 3 10 | x | ) | − | 3 10 | x | ( | 1 4 | − | 3 10 | x | ) |
| = | 3 10 | × | 1 4 | − | 3 10 | × | 3 10 | x | − | 3 10 | x | ( | 1 4 | − | 3 10 | x | ) |
| = | 3 40 | − | 9 100 | x | − | 3 10 | x | ( | 1 4 | − | 3 10 | x | ) |
| = | 3 40 | − | 9 100 | x | − | 3 10 | x | × | 1 4 | + | 3 10 | x | × | 3 10 | x |
| = | 3 40 | − | 9 100 | x | − | 3 40 | x | + | 9 100 | x | x |
| = | 3 40 | − | 33 200 | x | + | 9 100 | x | x |
3 40 | − | 33 200 | x | + | 9 100 | x | x | = | 5 8 | ( | 1 10 | + | 3 10 | x | ) |
| 方程右边 = | 5 8 | × | 1 10 | + | 5 8 | × | 3 10 | x |
| = | 1 16 | + | 3 16 | x |
3 40 | − | 33 200 | x | + | 9 100 | x | x | = | 1 16 | + | 3 16 | x |