| 1 | ÷ | X | = | 1 | ÷ | 99 50 | + | 1 | ÷ | 61 20 | + | 1 | ÷ | 83 25 |
| 方程两边同时乘以: | X |
| 1 | = | 1 | ÷ | 99 50 | × | X | + | 1 | ÷ | 61 20 | × | X | + | 1 | ÷ | 83 25 | × | X |
| - | 1 | ÷ | 99 50 | × | X | − | 1 | ÷ | 61 20 | × | X | − | 1 | ÷ | 83 25 | × | X | = | - | 1 |
| - | 50 99 | X | − | 20 61 | X | − | 25 83 | X | = | - | 1 |
| - | 568465 501237 | X | = | - | 1 |
| 1 | = | 568465 501237 | X |
568465 501237 | X | = | 1 |
| X | = | 1 | ÷ | 568465 501237 |
| = | 1 | × | 501237 568465 |
| X | = | 501237 568465 |
| X | = | 0.881738 |