| 5 | ( | 154 | ÷ | 5 | + | y | ) | ÷ | 121 10 | − | 154 | ÷ | 11 | = | 1 |
| 方程左边 = | 50 121 | ( | 154 | ÷ | 5 | + | y | ) | − | 14 |
50 121 | ( | 154 | ÷ | 5 | + | y | ) | − | 14 | = | 1 |
| 方程左边 = | 50 121 | × | 154 | ÷ | 5 | + | 50 121 | y | − | 14 |
| = | 140 11 | + | 50 121 | y | − | 14 |
| = | - | 14 11 | + | 50 121 | y |
| - | 14 11 | + | 50 121 | y | = | 1 |
50 121 | y | = | 1 | + | 14 11 |
50 121 | y | = | 25 11 |
| y | = | 25 11 | ÷ | 50 121 |
| = | 25 11 | × | 121 50 |
| = | 1 | × | 11 2 |
| y | = | 11 2 |
| y | = | 5.5 |