1 2 | ( | 2 | − | ( | 8 | ÷ | ( | 4 | − | y | ) | + | 2 | ) | ) | y | = | 1 2 | ( | 5 | − | ( | 2 | − | ( | 8 | ÷ | ( | 4 | − | y | ) | ) | ) | ) | × | 4 |
1 2 | × | 2 | y | − | 1 2 | ( | 8 | ÷ | ( | 4 | − | y | ) | + | 2 | ) | y | = | 1 2 | ( | 5 | − | ( | 2 | − | ( | 8 | ÷ | ( | 4 | − | y | ) | ) | ) | ) | × | 4 |
1 2 | × | 2 | y | − | 1 2 | ( | 8 | ÷ | ( | 4 | − | y | ) | + | 2 | ) | y | = | 1 2 | × | 5 | × | 4 | − | 1 2 | ( | 2 | − | ( | 8 | ÷ | ( | 4 | − | y | ) | ) | ) | × | 4 |
| 1 | y | − | 1 2 | ( | 8 | ÷ | ( | 4 | − | y | ) | + | 2 | ) | y | = | 10 | − | 2 | ( | 2 | − | ( | 8 | ÷ | ( | 4 | − | y | ) | ) | ) |
| 1 | y | − | 1 2 | × | 8 | ÷ | ( | 4 | − | y | ) | × | y | − | 1 2 | × | 2 | y | = | 10 | − | 2 | ( | 2 | − | ( | 8 | ÷ | ( | 4 | − | y | ) | ) | ) |
| 1 | y | − | 1 2 | × | 8 | ÷ | ( | 4 | − | y | ) | × | y | − | 1 2 | × | 2 | y | = | 10 | − | 2 | × | 2 | + | 2 | ( | 8 | ÷ | ( | 4 | − | y | ) | ) |
| 1 | y | − | 4 | ÷ | ( | 4 | − | y | ) | × | y | − | 1 | y | = | 10 | − | 4 | + | 2 | ( | 8 | ÷ | ( | 4 | − | y | ) | ) |
| 0 | y | − | 4 | ÷ | ( | 4 | − | y | ) | × | y | = | 6 | + | 2 | ( | 8 | ÷ | ( | 4 | − | y | ) | ) |
| 方程两边同时乘以: | ( | 4 | − | y | ) |
| - | 4 | y | = | 6 | ( | 4 | − | y | ) | + | 2 | ( | 8 | ÷ | ( | 4 | − | y | ) | ) | ( | 4 | − | y | ) |
| - | 4 | y | = | 6 | × | 4 | − | 6 | y | + | 2 | ( | 8 | ÷ | ( | 4 | − | y | ) | ) | ( | 4 | − | y | ) |
| - | 4 | y | = | 24 | − | 6 | y | + | 2 | ( | 8 | ÷ | ( | 4 | − | y | ) | ) | ( | 4 | − | y | ) |
| - | 4 | y | = | 24 | − | 6 | y | + | 2 | × | 8 | ÷ | ( | 4 | − | y | ) | × | ( | 4 | − | y | ) |
| - | 4 | y | = | 24 | − | 6 | y | + | 16 | ÷ | ( | 4 | − | y | ) | × | ( | 4 | − | y | ) |
| 方程两边同时乘以: | ( | 4 | − | y | ) |
| - | 4 | y | ( | 4 | − | y | ) | = | 24 | ( | 4 | − | y | ) | − | 6 | y | ( | 4 | − | y | ) | + | 16 | ( | 4 | − | y | ) |
| - | 4 | y | × | 4 | + | 4 | y | y | = | 24 | ( | 4 | − | y | ) | − | 6 | y | ( | 4 | − | y | ) | + | 16 | ( | 4 | − | y | ) |
| - | 4 | y | × | 4 | + | 4 | y | y | = | 24 | × | 4 | − | 24 | y | − | 6 | y | ( | 4 | − | y | ) | + | 16 | ( | 4 | − | y | ) |
| - | 16 | y | + | 4 | y | y | = | 96 | − | 24 | y | − | 6 | y | ( | 4 | − | y | ) | + | 16 | ( | 4 | − | y | ) |
| - | 16 | y | + | 4 | y | y | = | 96 | − | 24 | y | − | 6 | y | × | 4 | + | 6 | y | y | + | 16 | ( | 4 | − | y | ) |
| - | 16 | y | + | 4 | y | y | = | 96 | − | 24 | y | − | 24 | y | + | 6 | y | y | + | 16 | ( | 4 | − | y | ) |
| - | 16 | y | + | 4 | y | y | = | 96 | − | 48 | y | + | 6 | y | y | + | 16 | ( | 4 | − | y | ) |
| - | 16 | y | + | 4 | y | y | = | 96 | − | 48 | y | + | 6 | y | y | + | 16 | × | 4 | − | 16 | y |
| - | 16 | y | + | 4 | y | y | = | 96 | − | 48 | y | + | 6 | y | y | + | 64 | − | 16 | y |
| - | 16 | y | + | 4 | y | y | = | 160 | − | 64 | y | + | 6 | y | y |