| 1 | ÷ | 16 5 | = | 1 | + | ( | 1 20 | − | x | ) | ÷ | ( | 2 25 | + | 8 5 | x | ) |
| 方程两边同时乘以: | ( | 2 25 | + | 8 5 | x | ) |
| 1 | ÷ | 16 5 | × | ( | 2 25 | + | 8 5 | x | ) | = | 1 | ( | 2 25 | + | 8 5 | x | ) | + | ( | 1 20 | − | x | ) |
| 1 | ÷ | 16 5 | × | 2 25 | + | 1 | ÷ | 16 5 | × | 8 5 | x | = | 1 | ( | 2 25 | + | 8 5 | x | ) | + | ( | 1 20 | − | x | ) |
| 1 | ÷ | 16 5 | × | 2 25 | + | 1 | ÷ | 16 5 | × | 8 5 | x | = | 1 | × | 2 25 | + | 1 | × | 8 5 | x | + | ( | 1 20 | − | x | ) |
1 40 | + | 1 2 | x | = | 2 25 | + | 8 5 | x | + | ( | 1 20 | − | x | ) |
1 40 | + | 1 2 | x | = | 2 25 | + | 8 5 | x | + | 1 20 | − | x |
1 40 | + | 1 2 | x | = | 13 100 | + | 3 5 | x |
1 2 | x | − | 3 5 | x | = | 13 100 | − | 1 40 |
| - | 1 10 | x | = | 13 100 | − | 1 40 |
| - | 1 10 | x | = | 21 200 |
| - | 21 200 | = | 1 10 | x |
1 10 | x | = | - | 21 200 |
| x | = | - | 21 200 | ÷ | 1 10 |
| = | - | 21 200 | × | 10 |
| = | - | 21 20 | × | 1 |
| x | = | - | 21 20 |
| x | = | - 1.05 |