| 4 | ÷ | 5 | × | x | = | ( | 160 | − | x | ) | + | 1 | ÷ | 5 | × | x |
| 方程左边 = | 4 5 | x |
4 5 | x | = | ( | 160 | − | x | ) | + | 1 | ÷ | 5 | × | x |
| 方程右边 = | ( | 160 | − | x | ) | + | 1 5 | x |
4 5 | x | = | ( | 160 | − | x | ) | + | 1 5 | x |
| 方程右边 = | 160 | − | x | + | 1 5 | x |
| = | 160 | − | 4 5 | x |
4 5 | x | = | 160 | − | 4 5 | x |
4 5 | x | + | 4 5 | x | = | 160 |
8 5 | x | = | 160 |
| x | = | 160 | ÷ | 8 5 |
| = | 160 | × | 5 8 |
| = | 20 | × | 5 |
| x | = | 100 |