3 10 | = | 4 25 | X | ÷ | ( | 1 | − | 4 25 | X | ) |
| 方程两边同时乘以: | ( | 1 | − | 4 25 | X | ) |
3 10 | ( | 1 | − | 4 25 | X | ) | = | 4 25 | X |
3 10 | × | 1 | − | 3 10 | × | 4 25 | X | = | 4 25 | X |
3 10 | − | 6 125 | X | = | 4 25 | X |
| - | 6 125 | X | − | 4 25 | X | = | - | 3 10 |
| - | 26 125 | X | = | - | 3 10 |
3 10 | = | 26 125 | X |
26 125 | X | = | 3 10 |
| X | = | 3 10 | ÷ | 26 125 |
| = | 3 10 | × | 125 26 |
| = | 3 2 | × | 25 26 |
| X | = | 75 52 |
| X | = | 1.442308 |