( | 500 | − | x | ) | × | 1000 | − | 50000 | = | 242000 |
方程左边 = | 500 | × | 1000 | − | x | × | 1000 | − | 50000 |
= | 500000 | − | x | × | 1000 | − | 50000 |
= | 450000 | − | 1000 | x |
450000 | − | 1000 | x | = | 242000 |
- | 1000 | x | = | 242000 | − | 450000 |
- | 1000 | x | = | - | 208000 |
208000 | = | 1000 | x |
1000 | x | = | 208000 |
x | = | 208000 | ÷ | 1000 |
= | 208000 | × | 1 1000 |
= | 208 | × | 1 |
x | = | 208 |