| ( | 5 | y | + | 4 | ) | ÷ | 3 | + | ( | y | − | 1 | ) | ÷ | 4 | = | 2 | − | ( | 5 | y | − | 5 | ) | ÷ | 12 |
| 方程左边 = | 5 | y | × | 1 3 | + | 4 | × | 1 3 | + | ( | y | − | 1 | ) | × | 1 4 |
| = | 5 3 | y | + | 4 3 | + | ( | y | − | 1 | ) | × | 1 4 |
| = | 5 3 | y | + | 4 3 | + | y | × | 1 4 | − | 1 | × | 1 4 |
| = | 5 3 | y | + | 4 3 | + | y | × | 1 4 | − | 1 4 |
| = | 23 12 | y | + | 13 12 |
23 12 | y | + | 13 12 | = | 2 | − | ( | 5 | y | − | 5 | ) | ÷ | 12 |
| 方程右边 = | 2 | − | 5 | y | × | 1 12 | + | 5 | × | 1 12 |
| = | 2 | − | 5 12 | y | + | 5 12 |
| = | 29 12 | − | 5 12 | y |
23 12 | y | + | 13 12 | = | 29 12 | − | 5 12 | y |
23 12 | y | + | 5 12 | y | = | 29 12 | − | 13 12 |
7 3 | y | = | 29 12 | − | 13 12 |
7 3 | y | = | 4 3 |
| y | = | 4 3 | ÷ | 7 3 |
| = | 4 3 | × | 3 7 |
| = | 4 | × | 1 7 |
| y | = | 4 7 |
| y | = | 0.571429 |