3 4 | = | 1 2 | + | ( | x | − | 33 | ) | × | 1 20 | − | ( | 15 | + | 10 | ) | × | 1 20 |
方程右边 = | 1 2 | + | x | × | 1 20 | − | 33 | × | 1 20 | − | ( | 15 | + | 10 | ) | × | 1 20 |
= | 1 2 | + | x | × | 1 20 | − | 33 20 | − | ( | 15 | + | 10 | ) | × | 1 20 |
= | - | 23 20 | + | 1 20 | x | − | ( | 15 | + | 10 | ) | × | 1 20 |
= | - | 23 20 | + | 1 20 | x | − | 15 | × | 1 20 | − | 10 | × | 1 20 |
= | - | 23 20 | + | 1 20 | x | − | 3 4 | − | 1 2 |
= | - | 12 5 | + | 1 20 | x |
3 4 | = | - | 12 5 | + | 1 20 | x |
- | 1 20 | x | = | - | 12 5 | − | 3 4 |
- | 1 20 | x | = | - | 63 20 |
63 20 | = | 1 20 | x |
1 20 | x | = | 63 20 |
x | = | 63 20 | ÷ | 1 20 |
= | 63 20 | × | 20 |
= | 63 | × | 1 |
x | = | 63 |