| x | ÷ | 281 1000 | = | ( | 18 | − | x | ) | ÷ | 81 1000 |
| 方程右边 = | 18 | × | 1000 81 | − | x | × | 1000 81 |
| = | 2000 9 | − | x | × | 1000 81 |
1000 281 | x | = | 2000 9 | − | 1000 81 | x |
1000 281 | x | + | 1000 81 | x | = | 2000 9 |
362000 22761 | x | = | 2000 9 |
| x | = | 2000 9 | ÷ | 362000 22761 |
| = | 2000 9 | × | 22761 362000 |
| = | 1 | × | 2529 181 |
| x | = | 2529 181 |
| x | = | 13.972376 |