( | X | − | 1280 | ) | ( | 1 | − | 25 100 | ) | ÷ | 4000 | = | ( | X | − | 1280 | − | 540 | ) | ( | 1 | − | 25 100 | ) | ÷ | 5250 |
方程左边 = | X | ( | 1 | − | 25 100 | ) | × | 1 4000 | − | 1280 | ( | 1 | − | 25 100 | ) | × | 1 4000 |
= | X | ( | 1 | − | 25 100 | ) | × | 1 4000 | − | 8 25 | ( | 1 | − | 25 100 | ) |
= | X | × | 1 | × | 1 4000 | − | X | × | 25 100 | × | 1 4000 | − | 8 25 | ( | 1 | − | 25 100 | ) |
= | X | × | 1 4000 | − | X | × | 1 16000 | − | 8 25 | ( | 1 | − | 25 100 | ) |
= | 3 16000 | X | − | 8 25 | ( | 1 | − | 25 100 | ) |
= | 3 16000 | X | − | 8 25 | × | 1 | + | 8 25 | × | 25 100 |
= | 3 16000 | X | − | 8 25 | + | 2 25 |
= | 3 16000 | X | − | 6 25 |
3 16000 | X | − | 6 25 | = | ( | X | − | 1280 | − | 540 | ) | ( | 1 | − | 25 100 | ) | ÷ | 5250 |
方程右边 = | X | ( | 1 | − | 25 100 | ) | × | 1 5250 | − | 1280 | ( | 1 | − | 25 100 | ) | × | 1 5250 | − | 540 | ( | 1 | − | 25 100 | ) | × | 1 5250 |
= | X | ( | 1 | − | 25 100 | ) | × | 1 5250 | − | 128 525 | ( | 1 | − | 25 100 | ) | − | 18 175 | ( | 1 | − | 25 100 | ) |
= | X | × | 1 | × | 1 5250 | − | X | × | 25 100 | × | 1 5250 | − | 128 525 | ( | 1 | − | 25 100 | ) | − | 18 175 | ( | 1 | − | 25 100 | ) |
= | X | × | 1 5250 | − | X | × | 1 21000 | − | 128 525 | ( | 1 | − | 25 100 | ) | − | 18 175 | ( | 1 | − | 25 100 | ) |
= | 1 7000 | X | − | 128 525 | ( | 1 | − | 25 100 | ) | − | 18 175 | ( | 1 | − | 25 100 | ) |
= | 1 7000 | X | − | 128 525 | × | 1 | + | 128 525 | × | 25 100 | − | 18 175 | ( | 1 | − | 25 100 | ) |
= | 1 7000 | X | − | 128 525 | + | 32 525 | − | 18 175 | ( | 1 | − | 25 100 | ) |
= | 1 7000 | X | − | 32 175 | − | 18 175 | ( | 1 | − | 25 100 | ) |
= | 1 7000 | X | − | 32 175 | − | 18 175 | × | 1 | + | 18 175 | × | 25 100 |
= | 1 7000 | X | − | 32 175 | − | 18 175 | + | 9 350 |
= | 1 7000 | X | − | 13 50 |
3 16000 | X | − | 6 25 | = | 1 7000 | X | − | 13 50 |
3 16000 | X | − | 1 7000 | X | = | - | 13 50 | + | 6 25 |
1 22400 | X | = | - | 13 50 | + | 6 25 |
1 22400 | X | = | - | 1 50 |
X | = | - | 1 50 | ÷ | 1 22400 |
= | - | 1 50 | × | 22400 |
= | - | 1 | × | 448 |
X | = | - | 448 |