3 | ( | 2 | X | + | 5 | ) | = | 2 | ( | 4 | X | + | 3 | ) | + | 1 |
方程左边 = | 3 | × | 2 | X | + | 3 | × | 5 |
= | 6 | X | + | 15 |
6 | X | + | 15 | = | 2 | ( | 4 | X | + | 3 | ) | + | 1 |
方程右边 = | 2 | × | 4 | X | + | 2 | × | 3 | + | 1 |
= | 8 | X | + | 6 | + | 1 |
= | 8 | X | + | 7 |
6 | X | + | 15 | = | 8 | X | + | 7 |
6 | X | − | 8 | X | = | 7 | − | 15 |
- | 2 | X | = | 7 | − | 15 |
- | 2 | X | = | - | 8 |
8 | = | 2 | X |
2 | X | = | 8 |
X | = | 8 | ÷ | 2 |
= | 8 | × | 1 2 |
= | 4 | × | 1 |
X | = | 4 |