| X | = | 4 | × | 1 2 | × | 1 2 | × | 1 2 | × | 1 2 | + | 1 2 | ( | 1 | + | X | ) | + | 1 2 | × | 1 2 | × | 1 2 | ( | 3 | + | X | ) | + | 1 2 |
| 方程右边 = | 1 4 | + | 1 2 | ( | 1 | + | X | ) | + | 1 8 | ( | 3 | + | X | ) | + | 1 16 | ( | 4 | + | X | ) | + | 1 4 | ( | 2 | + | X | ) |
| X | = | 1 4 | + | 1 2 | ( | 1 | + | X | ) | + | 1 8 | ( | 3 | + | X | ) | + | 1 16 | ( | 4 | + | X | ) | + | 1 4 | ( | 2 | + | X | ) |
| 方程右边 = | 1 4 | + | 1 2 | × | 1 | + | 1 2 | X | + | 1 8 | ( | 3 | + | X | ) | + | 1 16 | ( | 4 | + | X | ) | + | 1 4 | ( | 2 | + | X | ) |
| = | 1 4 | + | 1 2 | + | 1 2 | X | + | 1 8 | ( | 3 | + | X | ) | + | 1 16 | ( | 4 | + | X | ) | + | 1 4 | ( | 2 | + | X | ) |
| = | 3 4 | + | 1 2 | X | + | 1 8 | ( | 3 | + | X | ) | + | 1 16 | ( | 4 | + | X | ) | + | 1 4 | ( | 2 | + | X | ) |
| = | 3 4 | + | 1 2 | X | + | 1 8 | × | 3 | + | 1 8 | X | + | 1 16 | ( | 4 | + | X | ) | + | 1 4 | ( | 2 | + | X | ) |
| = | 3 4 | + | 1 2 | X | + | 3 8 | + | 1 8 | X | + | 1 16 | ( | 4 | + | X | ) | + | 1 4 | ( | 2 | + | X | ) |
| = | 9 8 | + | 5 8 | X | + | 1 16 | ( | 4 | + | X | ) | + | 1 4 | ( | 2 | + | X | ) |
| = | 9 8 | + | 5 8 | X | + | 1 16 | × | 4 | + | 1 16 | X | + | 1 4 | ( | 2 | + | X | ) |
| = | 9 8 | + | 5 8 | X | + | 1 4 | + | 1 16 | X | + | 1 4 | ( | 2 | + | X | ) |
| = | 11 8 | + | 11 16 | X | + | 1 4 | ( | 2 | + | X | ) |
| = | 11 8 | + | 11 16 | X | + | 1 4 | × | 2 | + | 1 4 | X |
| = | 11 8 | + | 11 16 | X | + | 1 2 | + | 1 4 | X |
| = | 15 8 | + | 15 16 | X |
| X | = | 15 8 | + | 15 16 | X |
| X | − | 15 16 | X | = | 15 8 |
1 16 | X | = | 15 8 |
| X | = | 15 8 | ÷ | 1 16 |
| = | 15 8 | × | 16 |
| = | 15 | × | 2 |
| X | = | 30 |