| 450 | ÷ | X | − | 450 | ÷ | ( | X | + | 5 | ) | = | 1 |
| 方程两边同时乘以: | X |
| 450 | − | 450 | ÷ | ( | X | + | 5 | ) | × | X | = | 1 | X |
| 方程两边同时乘以: | ( | X | + | 5 | ) |
| 450 | ( | X | + | 5 | ) | − | 450 | X | = | 1 | X | ( | X | + | 5 | ) |
| 450 | X | + | 450 | × | 5 | − | 450 | X | = | 1 | X | ( | X | + | 5 | ) |
| 450 | X | + | 450 | × | 5 | − | 450 | X | = | 1 | X | X | + | 1 | X | × | 5 |
| 450 | X | + | 2250 | − | 450 | X | = | 1 | X | X | + | 5 | X |
| 0 | X | + | 2250 | = | 1 | X | X | + | 5 | X |