| ( | y | − | 5 | ) | ÷ | 8 | = | ( | y | + | 35 | ) | ÷ | 9 |
| 方程左边 = | y | × | 1 8 | − | 5 | × | 1 8 |
| = | y | × | 1 8 | − | 5 8 |
1 8 | y | − | 5 8 | = | ( | y | + | 35 | ) | ÷ | 9 |
| 方程右边 = | y | × | 1 9 | + | 35 | × | 1 9 |
| = | y | × | 1 9 | + | 35 9 |
1 8 | y | − | 5 8 | = | 1 9 | y | + | 35 9 |
1 8 | y | − | 1 9 | y | = | 35 9 | + | 5 8 |
1 72 | y | = | 35 9 | + | 5 8 |
1 72 | y | = | 325 72 |
| y | = | 325 72 | ÷ | 1 72 |
| = | 325 72 | × | 72 |
| = | 325 | × | 1 |
| y | = | 325 |