| X | + | ( | X | + | 3 | ) | ÷ | 2 | + | ( | X | − | 1 | ) | ÷ | 3 | = | 36 |
| 方程左边 = | X | + | X | × | 1 2 | + | 3 | × | 1 2 | + | ( | X | − | 1 | ) | × | 1 3 |
| = | X | + | X | × | 1 2 | + | 3 2 | + | ( | X | − | 1 | ) | × | 1 3 |
| = | 3 2 | X | + | 3 2 | + | ( | X | − | 1 | ) | × | 1 3 |
| = | 3 2 | X | + | 3 2 | + | X | × | 1 3 | − | 1 | × | 1 3 |
| = | 3 2 | X | + | 3 2 | + | X | × | 1 3 | − | 1 3 |
| = | 11 6 | X | + | 7 6 |
11 6 | X | + | 7 6 | = | 36 |
11 6 | X | = | 36 | − | 7 6 |
11 6 | X | = | 209 6 |
| X | = | 209 6 | ÷ | 11 6 |
| = | 209 6 | × | 6 11 |
| = | 19 | × | 1 |
| X | = | 19 |