13 10 | ÷ | 1 2 | + | ( | 3 100 | + | 1 50 | ) | ÷ | 3 100 | = | ( | x | − | 5 | ) | ÷ | 2 |
| 方程左边 = | 13 5 | + | ( | 3 100 | + | 1 50 | ) | × | 100 3 |
13 5 | + | ( | 3 100 | + | 1 50 | ) | × | 100 3 | = | ( | x | − | 5 | ) | ÷ | 2 |
| 方程左边 = | 13 5 | + | 3 100 | × | 100 3 | + | 1 50 | × | 100 3 |
| = | 13 5 | + | 1 | + | 2 3 |
| = | 64 15 |
64 15 | = | ( | x | − | 5 | ) | ÷ | 2 |
| 方程右边 = | x | × | 1 2 | − | 5 | × | 1 2 |
| = | x | × | 1 2 | − | 5 2 |
64 15 | = | 1 2 | x | − | 5 2 |
| - | 1 2 | x | = | - | 5 2 | − | 64 15 |
| - | 1 2 | x | = | - | 203 30 |
203 30 | = | 1 2 | x |
1 2 | x | = | 203 30 |
| x | = | 203 30 | ÷ | 1 2 |
| = | 203 30 | × | 2 |
| = | 203 15 | × | 1 |
| x | = | 203 15 |
| x | = | 13.533333 |