3151 10000 | ÷ | ( | 10 100 | − | X | ) | = | 18 |
| 方程两边同时乘以: | ( | 10 100 | − | X | ) |
3151 10000 | = | 18 | ( | 10 100 | − | X | ) |
3151 10000 | = | 18 | × | 10 100 | − | 18 | X |
3151 10000 | = | 9 5 | − | 18 | X |
| 18 | X | = | 9 5 | − | 3151 10000 |
| 18 | X | = | 14849 10000 |
| X | = | 14849 10000 | ÷ | 18 |
| = | 14849 10000 | × | 1 18 |
| X | = | 14849 180000 |
| X | = | 0.082494 |