7929 62500 | ÷ | x | = | 1289 10000 | ÷ | 86289 100000 |
| 方程两边同时乘以: | x |
7929 62500 | = | 1289 10000 | ÷ | 86289 100000 | × | x |
1289 10000 | ÷ | 86289 100000 | × | x | = | 7929 62500 |
12890 86289 | x | = | 7929 62500 |
| x | = | 7929 62500 | ÷ | 12890 86289 |
| = | 7929 62500 | × | 86289 12890 |
| x | = | 684185481 805625000 |
| x | = | 0.84926 |