1 5 | ( | 100 | + | 3 10 | x | ) | = | 10 | + | 3 10 | x |
| 方程左边 = | 1 5 | × | 100 | + | 1 5 | × | 3 10 | x |
| = | 20 | + | 3 50 | x |
| 20 | + | 3 50 | x | = | 10 | + | 3 10 | x |
3 50 | x | − | 3 10 | x | = | 10 | − | 20 |
| - | 6 25 | x | = | 10 | − | 20 |
| - | 6 25 | x | = | - | 10 |
| 10 | = | 6 25 | x |
6 25 | x | = | 10 |
| x | = | 10 | ÷ | 6 25 |
| = | 10 | × | 25 6 |
| = | 5 | × | 25 3 |
| x | = | 125 3 |
| x | = | 41.666667 |