| ( | X | − | 1 | ) | ÷ | 4 | = | 2 | − | ( | 4 | X | − | 3 | ) | ÷ | 6 |
| 方程左边 = | X | × | 1 4 | − | 1 | × | 1 4 |
| = | X | × | 1 4 | − | 1 4 |
1 4 | X | − | 1 4 | = | 2 | − | ( | 4 | X | − | 3 | ) | ÷ | 6 |
| 方程右边 = | 2 | − | 4 | X | × | 1 6 | + | 3 | × | 1 6 |
| = | 2 | − | 2 3 | X | + | 1 2 |
| = | 5 2 | − | 2 3 | X |
1 4 | X | − | 1 4 | = | 5 2 | − | 2 3 | X |
1 4 | X | + | 2 3 | X | = | 5 2 | + | 1 4 |
11 12 | X | = | 5 2 | + | 1 4 |
11 12 | X | = | 11 4 |
| X | = | 11 4 | ÷ | 11 12 |
| = | 11 4 | × | 12 11 |
| = | 1 | × | 3 |
| X | = | 3 |