| 1 | x | ÷ | 3 | + | ( | 8700 | − | x | ) | × | 1 | ÷ | 2 | = | 12100 | − | 8700 |
| 方程左边 = | 1 3 | x | + | ( | 8700 | − | x | ) | × | 1 2 |
1 3 | x | + | ( | 8700 | − | x | ) | × | 1 2 | = | 12100 | − | 8700 |
| 方程左边 = | 1 3 | x | + | 8700 | × | 1 2 | − | x | × | 1 2 |
| = | 1 3 | x | + | 4350 | − | x | × | 1 2 |
| = | - | 1 6 | x | + | 4350 |
| - | 1 6 | x | + | 4350 | = | 12100 | − | 8700 |
| 方程右边 = | 3400 |
| - | 1 6 | x | + | 4350 | = | 3400 |
| - | 1 6 | x | = | 3400 | − | 4350 |
| - | 1 6 | x | = | - | 950 |
| 950 | = | 1 6 | x |
1 6 | x | = | 950 |
| x | = | 950 | ÷ | 1 6 |
| = | 950 | × | 6 |
| x | = | 5700 |