506 5 | + | ( | 20 | − | x | ) | × | 43 10 | = | ( | 949 5 | + | 13 2 | x | ) | ÷ | 3 2 |
| 方程左边 = | 506 5 | + | 20 | × | 43 10 | − | x | × | 43 10 |
| = | 506 5 | + | 86 | − | x | × | 43 10 |
| = | 936 5 | − | 43 10 | x |
936 5 | − | 43 10 | x | = | ( | 949 5 | + | 13 2 | x | ) | ÷ | 3 2 |
| 方程右边 = | 949 5 | × | 2 3 | + | 13 2 | x | × | 2 3 |
| = | 1898 15 | + | 13 3 | x |
936 5 | − | 43 10 | x | = | 1898 15 | + | 13 3 | x |
| - | 43 10 | x | − | 13 3 | x | = | 1898 15 | − | 936 5 |
| - | 259 30 | x | = | 1898 15 | − | 936 5 |
| - | 259 30 | x | = | - | 182 3 |
182 3 | = | 259 30 | x |
259 30 | x | = | 182 3 |
| x | = | 182 3 | ÷ | 259 30 |
| = | 182 3 | × | 30 259 |
| = | 26 | × | 10 37 |
| x | = | 260 37 |
| x | = | 7.027027 |