| 1 | ÷ | X | = | 1 | ÷ | 161 100 | + | 1 | ÷ | 15 4 | + | 1 | ÷ | 4 |
| 方程两边同时乘以: | X |
| 1 | = | 1 | ÷ | 161 100 | × | X | + | 1 | ÷ | 15 4 | × | X | + | 1 | ÷ | 4 | × | X |
| - | 1 | ÷ | 161 100 | × | X | − | 1 | ÷ | 15 4 | × | X | − | 1 | ÷ | 4 | × | X | = | - | 1 |
| - | 100 161 | X | − | 4 15 | X | − | 1 4 | X | = | - | 1 |
| - | 10991 9660 | X | = | - | 1 |
| 1 | = | 10991 9660 | X |
10991 9660 | X | = | 1 |
| X | = | 1 | ÷ | 10991 9660 |
| = | 1 | × | 9660 10991 |
| X | = | 9660 10991 |
| X | = | 0.878901 |