| ( | y | − | ( | 2 | y | − | 3 | ) | ÷ | 3 | ) | × | 2 | + | ( | 2 | y | − | 3 | ) | ÷ | 3 | + | y | = | 29 |
| 方程左边 = | y | × | 2 | − | ( | 2 | y | − | 3 | ) | ÷ | 3 | × | 2 | + | ( | 2 | y | − | 3 | ) | × | 1 3 | + | y |
| = | y | × | 2 | − | ( | 2 | y | − | 3 | ) | × | 2 3 | + | ( | 2 | y | − | 3 | ) | × | 1 3 | + | y |
| = | 3 | y | − | ( | 2 | y | − | 3 | ) | × | 2 3 | + | ( | 2 | y | − | 3 | ) | × | 1 3 |
| = | 3 | y | − | 2 | y | × | 2 3 | + | 3 | × | 2 3 | + | ( | 2 | y | − | 3 | ) | × | 1 3 |
| = | 3 | y | − | 4 3 | y | + | 2 | + | ( | 2 | y | − | 3 | ) | × | 1 3 |
| = | 5 3 | y | + | 2 | + | ( | 2 | y | − | 3 | ) | × | 1 3 |
| = | 5 3 | y | + | 2 | + | 2 | y | × | 1 3 | − | 3 | × | 1 3 |
| = | 5 3 | y | + | 2 | + | 2 3 | y | − | 1 |
| = | 7 3 | y | + | 1 |
7 3 | y | + | 1 | = | 29 |
7 3 | y | = | 29 | − | 1 |
7 3 | y | = | 28 |
| y | = | 28 | ÷ | 7 3 |
| = | 28 | × | 3 7 |
| = | 4 | × | 3 |
| y | = | 12 |