| ( | 33 100 | x | − | 11 10 | ) | ÷ | 77 200 | = | ( | 15 | − | x | ) | ÷ | 3 2 |
| 方程左边 = | 33 100 | x | × | 200 77 | − | 11 10 | × | 200 77 |
| = | 6 7 | x | − | 20 7 |
6 7 | x | − | 20 7 | = | ( | 15 | − | x | ) | ÷ | 3 2 |
| 方程右边 = | 15 | × | 2 3 | − | x | × | 2 3 |
| = | 10 | − | x | × | 2 3 |
6 7 | x | − | 20 7 | = | 10 | − | 2 3 | x |
6 7 | x | + | 2 3 | x | = | 10 | + | 20 7 |
32 21 | x | = | 10 | + | 20 7 |
32 21 | x | = | 90 7 |
| x | = | 90 7 | ÷ | 32 21 |
| = | 90 7 | × | 21 32 |
| = | 45 | × | 3 16 |
| x | = | 135 16 |
| x | = | 8.4375 |