67 10 | x | + | 47 5 | = | 123 10 | ( | x | − | 4 | ) | + | 13 5 |
方程右边 = | 123 10 | x | − | 123 10 | × | 4 | + | 13 5 |
= | 123 10 | x | − | 246 5 | + | 13 5 |
= | 123 10 | x | − | 233 5 |
67 10 | x | + | 47 5 | = | 123 10 | x | − | 233 5 |
67 10 | x | − | 123 10 | x | = | - | 233 5 | − | 47 5 |
- | 28 5 | x | = | - | 233 5 | − | 47 5 |
- | 28 5 | x | = | - | 56 |
56 | = | 28 5 | x |
28 5 | x | = | 56 |
x | = | 56 | ÷ | 28 5 |
= | 56 | × | 5 28 |
= | 2 | × | 5 |
x | = | 10 |