0 | = | 7 10 | − | 3 20 | − | ( | 1 | + | 1 10 | ) | ÷ | 1 10 | × | 2 25 | − | ( | 1 | − | X | ) |
方程右边 = | 7 10 | − | 3 20 | − | ( | 1 | + | 1 10 | ) | × | 4 5 | − | ( | 1 | − | X | ) |
= | 11 20 | − | ( | 1 | + | 1 10 | ) | × | 4 5 | − | ( | 1 | − | X | ) |
0 | = | 11 20 | − | ( | 1 | + | 1 10 | ) | × | 4 5 | − | ( | 1 | − | X | ) |
方程右边 = | 11 20 | − | 1 | × | 4 5 | − | 1 10 | × | 4 5 | − | ( | 1 | − | X | ) |
= | 11 20 | − | 4 5 | − | 2 25 | − | ( | 1 | − | X | ) |
= | - | 33 100 | − | ( | 1 | − | X | ) |
= | - | 33 100 | − | 1 | + | X |
= | - | 133 100 | + | X |
0 | = | - | 133 100 | + | X |
- | X | = | - | 133 100 | − | 0 |
- | X | = | - | 133 100 |
133 100 | = | X |
X | = | 133 100 |