12 5 | ( | 17 4 | + | x | ) | − | 12 5 | × | 17 4 | + | x | = | 161 20 |
| 方程左边 = | 12 5 | ( | 17 4 | + | x | ) | − | 51 5 | + | x |
12 5 | ( | 17 4 | + | x | ) | − | 51 5 | + | x | = | 161 20 |
| 方程左边 = | 12 5 | × | 17 4 | + | 12 5 | x | − | 51 5 | + | x |
| = | 51 5 | + | 12 5 | x | − | 51 5 | + | x |
| = | 0 | + | 17 5 | x |
17 5 | x | = | 161 20 |
| x | = | 161 20 | ÷ | 17 5 |
| = | 161 20 | × | 5 17 |
| = | 161 4 | × | 1 17 |
| x | = | 161 68 |
| x | = | 2.367647 |