| ( | 8 | x | + | 4 | ) | ÷ | 5 | = | ( | 11 | x | + | 1 | ) | ÷ | 7 | + | 1 |
| 方程左边 = | 8 | x | × | 1 5 | + | 4 | × | 1 5 |
| = | 8 5 | x | + | 4 5 |
8 5 | x | + | 4 5 | = | ( | 11 | x | + | 1 | ) | ÷ | 7 | + | 1 |
| 方程右边 = | 11 | x | × | 1 7 | + | 1 | × | 1 7 | + | 1 |
| = | 11 7 | x | + | 1 7 | + | 1 |
| = | 11 7 | x | + | 8 7 |
8 5 | x | + | 4 5 | = | 11 7 | x | + | 8 7 |
8 5 | x | − | 11 7 | x | = | 8 7 | − | 4 5 |
1 35 | x | = | 8 7 | − | 4 5 |
1 35 | x | = | 12 35 |
| x | = | 12 35 | ÷ | 1 35 |
| = | 12 35 | × | 35 |
| = | 12 | × | 1 |
| x | = | 12 |