| ( | 16 | ÷ | ( | 36 | + | x | ) | ) | − | ( | 15 | ÷ | ( | 27 | + | x | ) | ) | = | 1 |
| 16 | ÷ | ( | 36 | + | x | ) | − | ( | 15 | ÷ | ( | 27 | + | x | ) | ) | = | 1 |
| 方程两边同时乘以: | ( | 36 | + | x | ) |
| 16 | − | ( | 15 | ÷ | ( | 27 | + | x | ) | ) | ( | 36 | + | x | ) | = | 1 | ( | 36 | + | x | ) |
| 16 | − | 15 | ÷ | ( | 27 | + | x | ) | × | ( | 36 | + | x | ) | = | 1 | ( | 36 | + | x | ) |
| 16 | − | 15 | ÷ | ( | 27 | + | x | ) | × | ( | 36 | + | x | ) | = | 1 | × | 36 | + | 1 | x |
| 16 | − | 15 | ÷ | ( | 27 | + | x | ) | × | ( | 36 | + | x | ) | = | 36 | + | 1 | x |
| 方程两边同时乘以: | ( | 27 | + | x | ) |
| 16 | ( | 27 | + | x | ) | − | 15 | ( | 36 | + | x | ) | = | 36 | ( | 27 | + | x | ) | + | 1 | x | ( | 27 | + | x | ) |
| 16 | × | 27 | + | 16 | x | − | 15 | ( | 36 | + | x | ) | = | 36 | ( | 27 | + | x | ) | + | 1 | x | ( | 27 | + | x | ) |
| 16 | × | 27 | + | 16 | x | − | 15 | ( | 36 | + | x | ) | = | 36 | × | 27 | + | 36 | x | + | 1 | x | ( | 27 | + | x | ) |
| 432 | + | 16 | x | − | 15 | ( | 36 | + | x | ) | = | 972 | + | 36 | x | + | 1 | x | ( | 27 | + | x | ) |
| 432 | + | 16 | x | − | 15 | × | 36 | − | 15 | x | = | 972 | + | 36 | x | + | 1 | x | ( | 27 | + | x | ) |
| 432 | + | 16 | x | − | 15 | × | 36 | − | 15 | x | = | 972 | + | 36 | x | + | 1 | x | × | 27 | + | 1 | x | x |
| 432 | + | 16 | x | − | 540 | − | 15 | x | = | 972 | + | 36 | x | + | 27 | x | + | 1 | x | x |
| - | 108 | + | 1 | x | = | 972 | + | 63 | x | + | 1 | x | x |