991 25 | ÷ | ( | 1 | + | X | ) | = | 3523 100 |
| 方程两边同时乘以: | ( | 1 | + | X | ) |
991 25 | = | 3523 100 | ( | 1 | + | X | ) |
991 25 | = | 3523 100 | × | 1 | + | 3523 100 | X |
991 25 | = | 3523 100 | + | 3523 100 | X |
| - | 3523 100 | X | = | 3523 100 | − | 991 25 |
| - | 3523 100 | X | = | - | 441 100 |
441 100 | = | 3523 100 | X |
3523 100 | X | = | 441 100 |
| X | = | 441 100 | ÷ | 3523 100 |
| = | 441 100 | × | 100 3523 |
| = | 441 | × | 1 3523 |
| X | = | 441 3523 |
| X | = | 0.125177 |