| X | − | 3 1000 | = | 2 500 | ÷ | 70 100 | × | ( | 1 | + | X | ) |
| 方程右边 = | 1 175 | ( | 1 | + | X | ) |
| X | − | 3 1000 | = | 1 175 | ( | 1 | + | X | ) |
| 方程右边 = | 1 175 | × | 1 | + | 1 175 | X |
| = | 1 175 | + | 1 175 | X |
| X | − | 3 1000 | = | 1 175 | + | 1 175 | X |
| X | − | 1 175 | X | = | 1 175 | + | 3 1000 |
174 175 | X | = | 1 175 | + | 3 1000 |
174 175 | X | = | 61 7000 |
| X | = | 61 7000 | ÷ | 174 175 |
| = | 61 7000 | × | 175 174 |
| = | 61 40 | × | 1 174 |
| X | = | 61 6960 |
| X | = | 0.008764 |