( | X | − | 240 | ) | × | 3 4 | ÷ | 2250 | = | ( | X | − | 240 | − | 100 | ) | × | 3 4 | ÷ | 2000 |
方程左边 = | ( | X | − | 240 | ) | × | 1 3000 |
( | X | − | 240 | ) | × | 1 3000 | = | ( | X | − | 240 | − | 100 | ) | × | 3 4 | ÷ | 2000 |
方程左边 = | X | × | 1 3000 | − | 240 | × | 1 3000 |
= | X | × | 1 3000 | − | 2 25 |
1 3000 | X | − | 2 25 | = | ( | X | − | 240 | − | 100 | ) | × | 3 4 | ÷ | 2000 |
方程右边 = | ( | X | − | 240 | − | 100 | ) | × | 3 8000 |
1 3000 | X | − | 2 25 | = | ( | X | − | 240 | − | 100 | ) | × | 3 8000 |
方程右边 = | X | × | 3 8000 | − | 240 | × | 3 8000 | − | 100 | × | 3 8000 |
= | X | × | 3 8000 | − | 9 100 | − | 3 80 |
= | 3 8000 | X | − | 51 400 |
1 3000 | X | − | 2 25 | = | 3 8000 | X | − | 51 400 |
1 3000 | X | − | 3 8000 | X | = | - | 51 400 | + | 2 25 |
- | 1 24000 | X | = | - | 51 400 | + | 2 25 |
- | 1 24000 | X | = | - | 19 400 |
19 400 | = | 1 24000 | X |
1 24000 | X | = | 19 400 |
X | = | 19 400 | ÷ | 1 24000 |
= | 19 400 | × | 24000 |
= | 19 | × | 60 |
X | = | 1140 |