40 | x | × | 7 10 | = | ( | x | − | 6 | ) | × | 40 | × | 4 5 |
方程左边 = | 28 | x |
28 | x | = | ( | x | − | 6 | ) | × | 40 | × | 4 5 |
方程右边 = | ( | x | − | 6 | ) | × | 32 |
28 | x | = | ( | x | − | 6 | ) | × | 32 |
方程右边 = | x | × | 32 | − | 6 | × | 32 |
= | x | × | 32 | − | 192 |
28 | x | = | 32 | x | − | 192 |
28 | x | − | 32 | x | = | - | 192 |
- | 4 | x | = | - | 192 |
192 | = | 4 | x |
4 | x | = | 192 |
x | = | 192 | ÷ | 4 |
= | 192 | × | 1 4 |
= | 48 | × | 1 |
x | = | 48 |