120 | ÷ | x | − | 20 | = | 1 | + | ( | 120 | − | x | ) | ÷ | ( | 3 2 | x | ) |
方程两边同时乘以: | x | , | ( | 3 2 | × | 1 | ) |
120 | ( | 3 2 | × | 1 | ) | − | 20 | x | ( | 3 2 | × | 1 | ) | = | 1 | x | ( | 3 2 | × | 1 | ) | + | ( | 120 | − | x | ) | × | 1 |
120 | × | 3 2 | × | 1 | − | 20 | x | ( | 3 2 | × | 1 | ) | = | 1 | x | ( | 3 2 | × | 1 | ) | + | ( | 120 | − | x | ) | × | 1 |
120 | × | 3 2 | × | 1 | − | 20 | x | ( | 3 2 | × | 1 | ) | = | 1 | x | × | 3 2 | × | 1 | + | ( | 120 | − | x | ) | × | 1 |
180 | − | 20 | x | ( | 3 2 | × | 1 | ) | = | 3 2 | x | + | ( | 120 | − | x | ) | × | 1 |
180 | − | 20 | x | × | 3 2 | × | 1 | = | 3 2 | x | + | ( | 120 | − | x | ) | × | 1 |
180 | − | 20 | x | × | 3 2 | × | 1 | = | 3 2 | x | + | 120 | × | 1 | − | x | × | 1 |
180 | − | 30 | x | = | 3 2 | x | + | 120 | − | x | × | 1 |
180 | − | 30 | x | = | 1 2 | x | + | 120 |
- | 30 | x | − | 1 2 | x | = | 120 | − | 180 |
- | 61 2 | x | = | 120 | − | 180 |
- | 61 2 | x | = | - | 60 |
60 | = | 61 2 | x |
61 2 | x | = | 60 |
x | = | 60 | ÷ | 61 2 |
= | 60 | × | 2 61 |
x | = | 120 61 |
x | = | 1.967213 |