| 4 | ( | x | − | 5 | ) | = | 20 | + | 101 100 | ( | ( | 20 | − | x | ) | − | 1 2 | ( | x | − | 5 | ) | ) |
| 方程左边 = | 4 | x | − | 4 | × | 5 |
| = | 4 | x | − | 20 |
| 4 | x | − | 20 | = | 20 | + | 101 100 | ( | ( | 20 | − | x | ) | − | 1 2 | ( | x | − | 5 | ) | ) |
| 方程右边 = | 20 | + | 101 100 | ( | 20 | − | x | ) | − | 101 100 | × | 1 2 | ( | x | − | 5 | ) |
| = | 20 | + | 101 100 | ( | 20 | − | x | ) | − | 101 200 | ( | x | − | 5 | ) |
| = | 20 | + | 101 100 | × | 20 | − | 101 100 | x | − | 101 200 | ( | x | − | 5 | ) |
| = | 20 | + | 101 5 | − | 101 100 | x | − | 101 200 | ( | x | − | 5 | ) |
| = | 201 5 | − | 101 100 | x | − | 101 200 | ( | x | − | 5 | ) |
| = | 201 5 | − | 101 100 | x | − | 101 200 | x | + | 101 200 | × | 5 |
| = | 201 5 | − | 101 100 | x | − | 101 200 | x | + | 101 40 |
| = | 1709 40 | − | 303 200 | x |
| 4 | x | − | 20 | = | 1709 40 | − | 303 200 | x |
| 4 | x | + | 303 200 | x | = | 1709 40 | + | 20 |
1103 200 | x | = | 1709 40 | + | 20 |
1103 200 | x | = | 2509 40 |
| x | = | 2509 40 | ÷ | 1103 200 |
| = | 2509 40 | × | 200 1103 |
| = | 2509 | × | 5 1103 |
| x | = | 12545 1103 |
| x | = | 11.373527 |