1000 | ( | X | − | 180 | ) | = | 1500 | ( | X | − | 500 | ) |
方程左边 = | 1000 | X | − | 1000 | × | 180 |
= | 1000 | X | − | 180000 |
1000 | X | − | 180000 | = | 1500 | ( | X | − | 500 | ) |
方程右边 = | 1500 | X | − | 1500 | × | 500 |
= | 1500 | X | − | 750000 |
1000 | X | − | 180000 | = | 1500 | X | − | 750000 |
1000 | X | − | 1500 | X | = | - | 750000 | + | 180000 |
- | 500 | X | = | - | 750000 | + | 180000 |
- | 500 | X | = | - | 570000 |
570000 | = | 500 | X |
500 | X | = | 570000 |
X | = | 570000 | ÷ | 500 |
= | 570000 | × | 1 500 |
= | 1140 | × | 1 |
X | = | 1140 |