| 8 | ( | ( | 30 | − | y | ) | + | 6 | ( | 2 | y | − | 11 | ) | ) | = | 262 |
| 方程左边 = | 8 | ( | 30 | − | y | ) | + | 8 | × | 6 | ( | 2 | y | − | 11 | ) |
| = | 8 | ( | 30 | − | y | ) | + | 48 | ( | 2 | y | − | 11 | ) |
| = | 8 | × | 30 | − | 8 | y | + | 48 | ( | 2 | y | − | 11 | ) |
| = | 240 | − | 8 | y | + | 48 | ( | 2 | y | − | 11 | ) |
| = | 240 | − | 8 | y | + | 48 | × | 2 | y | − | 48 | × | 11 |
| = | 240 | − | 8 | y | + | 96 | y | − | 528 |
| = | - | 288 | + | 88 | y |
| - | 288 | + | 88 | y | = | 262 |
| 88 | y | = | 262 | + | 288 |
| 88 | y | = | 550 |
| y | = | 550 | ÷ | 88 |
| = | 550 | × | 1 88 |
| = | 25 | × | 1 4 |
| y | = | 25 4 |
| y | = | 6.25 |