| X | × | 600 | ÷ | ( | ( | 1 | − | X | ) | × | 1800 | ) | = | 3 50 |
| 方程两边同时乘以: | ( | ( | 1 | − | X | ) | × | 1800 | ) |
| X | × | 600 | = | 3 50 | ( | ( | 1 | − | X | ) | × | 1800 | ) |
| X | × | 600 | = | 3 50 | ( | 1 | − | X | ) | × | 1800 |
| X | × | 600 | = | 108 | ( | 1 | − | X | ) |
| 600 | X | = | 108 | × | 1 | − | 108 | X |
| 600 | X | = | 108 | − | 108 | X |
| 600 | X | + | 108 | X | = | 108 |
| 708 | X | = | 108 |
| X | = | 108 | ÷ | 708 |
| = | 108 | × | 1 708 |
| = | 9 | × | 1 59 |
| X | = | 9 59 |
| X | = | 0.152542 |