| ( | 3 4 | − | x | ) | ( | 80 | ÷ | 41 | − | x | ) | − | ( | 1 2 | + | x | ) | ( | 80 | ÷ | 41 | − | x | ) | − | ( | 3 4 | − | x | ) | ( | 1 2 | + | x | ) | = | 0 |
| 方程左边 = | 3 4 | ( | 80 | ÷ | 41 | − | x | ) | − | x | ( | 80 | ÷ | 41 | − | x | ) | − | ( | 1 2 | + | x | ) | ( | 80 | ÷ | 41 | − | x | ) | − | ( | 3 4 | − | x | ) | ( | 1 2 | + | x | ) |
| = | 3 4 | × | 80 | ÷ | 41 | − | 3 4 | x | − | x | ( | 80 | ÷ | 41 | − | x | ) | − | ( | 1 2 | + | x | ) | ( | 80 | ÷ | 41 | − | x | ) | − | ( | 3 4 | − | x | ) | ( | 1 2 | + | x | ) |
| = | 60 41 | − | 3 4 | x | − | x | ( | 80 | ÷ | 41 | − | x | ) | − | ( | 1 2 | + | x | ) | ( | 80 | ÷ | 41 | − | x | ) | − | ( | 3 4 | − | x | ) | ( | 1 2 | + | x | ) |
| = | 60 41 | − | 3 4 | x | − | x | × | 80 | ÷ | 41 | + | x | x | − | ( | 1 2 | + | x | ) | ( | 80 | ÷ | 41 | − | x | ) | − | ( | 3 4 | − | x | ) | ( | 1 2 | + | x | ) |
| = | 60 41 | − | 3 4 | x | − | x | × | 80 41 | + | x | x | − | ( | 1 2 | + | x | ) | ( | 80 | ÷ | 41 | − | x | ) | − | ( | 3 4 | − | x | ) | ( | 1 2 | + | x | ) |
| = | 60 41 | − | 443 164 | x | + | x | x | − | ( | 1 2 | + | x | ) | ( | 80 | ÷ | 41 | − | x | ) | − | ( | 3 4 | − | x | ) | ( | 1 2 | + | x | ) |
| = | 60 41 | − | 443 164 | x | + | x | x | − | 1 2 | ( | 80 | ÷ | 41 | − | x | ) | − | x | ( | 80 | ÷ | 41 | − | x | ) | − | ( | 3 4 | − | x | ) | ( | 1 2 | + | x | ) |
| = | 60 41 | − | 443 164 | x | + | x | x | − | 1 2 | × | 80 | ÷ | 41 | + | 1 2 | x | − | x | ( | 80 | ÷ | 41 | − | x | ) |
| = | 60 41 | − | 443 164 | x | + | x | x | − | 40 41 | + | 1 2 | x | − | x | ( | 80 | ÷ | 41 | − | x | ) | − | ( | 3 4 | − | x | ) | ( | 1 2 | + | x | ) |
| = | 20 41 | − | 361 164 | x | + | x | x | − | x | ( | 80 | ÷ | 41 | − | x | ) | − | ( | 3 4 | − | x | ) | ( | 1 2 | + | x | ) |
| = | 20 41 | − | 361 164 | x | + | x | x | − | x | × | 80 | ÷ | 41 | + | x | x | − | ( | 3 4 | − | x | ) | ( | 1 2 | + | x | ) |
| = | 20 41 | − | 361 164 | x | + | x | x | − | x | × | 80 41 | + | x | x | − | ( | 3 4 | − | x | ) | ( | 1 2 | + | x | ) |
| = | 20 41 | − | 681 164 | x | + | x | x | + | x | x | − | ( | 3 4 | − | x | ) | ( | 1 2 | + | x | ) |
| = | 20 41 | − | 681 164 | x | + | x | x | + | x | x | − | 3 4 | ( | 1 2 | + | x | ) | + | x | ( | 1 2 | + | x | ) |
| = | 20 41 | − | 681 164 | x | + | x | x | + | x | x | − | 3 4 | × | 1 2 | − | 3 4 | x | + | x |
| = | 20 41 | − | 681 164 | x | + | x | x | + | x | x | − | 3 8 | − | 3 4 | x | + | x | ( | 1 2 | + | x | ) |
| = | 37 328 | − | 201 41 | x | + | x | x | + | x | x | + | x | ( | 1 2 | + | x | ) |
| = | 37 328 | − | 201 41 | x | + | x | x | + | x | x | + | x | × | 1 2 | + | x | x |
| = | 37 328 | − | 361 82 | x | + | x | x | + | x | x | + | x | x |
37 328 | − | 361 82 | x | + | x | x | + | x | x | + | x | x | = | 0 |