2 | ( | X | + | 2 | + | 2 | + | 2 | ) | = | 12 | + | ( | 6 | × | 2 | + | 8 | × | 2 | + | 12 | × | 2 | + | 4 | X | ) |
方程左边 = | 2 | X | + | 2 | × | 2 | + | 2 | × | 2 | + | 2 | × | 2 |
= | 2 | X | + | 4 | + | 4 | + | 4 |
= | 2 | X | + | 12 |
2 | X | + | 12 | = | 12 | + | ( | 6 | × | 2 | + | 8 | × | 2 | + | 12 | × | 2 | + | 4 | X | ) |
方程右边 = | 12 | + | 6 | × | 2 | + | 8 | × | 2 | + | 12 | × | 2 | + | 4 | X |
= | 12 | + | 12 | + | 16 | + | 24 | + | 4 | X |
= | 64 | + | 4 | X |
2 | X | + | 12 | = | 64 | + | 4 | X |
2 | X | − | 4 | X | = | 64 | − | 12 |
- | 2 | X | = | 64 | − | 12 |
- | 2 | X | = | 52 |
- | 52 | = | 2 | X |
2 | X | = | - | 52 |
X | = | - | 52 | ÷ | 2 |
= | - | 52 | × | 1 2 |
= | - | 26 | × | 1 |
X | = | - | 26 |