| 1 | ( | 1 | − | x | ) | + | x | × | 4 | = | 4 | ( | 1 | − | x | ) | + | x | × | 2 |
| 方程左边 = | 1 | × | 1 | − | 1 | x | + | 4 | x |
| = | 1 | − | 1 | x | + | 4 | x |
| = | 1 | + | 3 | x |
| 1 | + | 3 | x | = | 4 | ( | 1 | − | x | ) | + | x | × | 2 |
| 方程右边 = | 4 | × | 1 | − | 4 | x | + | 2 | x |
| = | 4 | − | 4 | x | + | 2 | x |
| = | 4 | − | 2 | x |
| 1 | + | 3 | x | = | 4 | − | 2 | x |
| 3 | x | + | 2 | x | = | 4 | − | 1 |
| 5 | x | = | 4 | − | 1 |
| 5 | x | = | 3 |
| x | = | 3 | ÷ | 5 |
| = | 3 | × | 1 5 |
| x | = | 3 5 |
| x | = | 0.6 |