( | 3 | x | − | 6 | ) | ÷ | ( | x | + | 7 | ) | = | 3 |
方程两边同时乘以: | ( | x | + | 7 | ) |
( | 3 | x | − | 6 | ) | = | 3 | ( | x | + | 7 | ) |
3 | x | − | 6 | = | 3 | ( | x | + | 7 | ) |
3 | x | − | 6 | = | 3 | x | + | 3 | × | 7 |
3 | x | − | 6 | = | 3 | x | + | 21 |
3 | x | − | 3 | x | = | 21 | + | 6 |
0 | x | = | 21 | + | 6 |
0 | x | = | 27 |
( | 4 | x | − | 3 | ) | ÷ | ( | 2 | x | + | 6 | ) | = | 2 |
方程两边同时乘以: | ( | 2 | x | + | 6 | ) |
( | 4 | x | − | 3 | ) | = | 2 | ( | 2 | x | + | 6 | ) |
4 | x | − | 3 | = | 2 | ( | 2 | x | + | 6 | ) |
4 | x | − | 3 | = | 2 | × | 2 | x | + | 2 | × | 6 |
4 | x | − | 3 | = | 4 | x | + | 12 |
4 | x | − | 4 | x | = | 12 | + | 3 |
0 | x | = | 12 | + | 3 |
0 | x | = | 15 |
( | 7 | x | − | 5 | ) | ÷ | ( | x | + | 4 | ) | = | 7 |
方程两边同时乘以: | ( | x | + | 4 | ) |
( | 7 | x | − | 5 | ) | = | 7 | ( | x | + | 4 | ) |
7 | x | − | 5 | = | 7 | ( | x | + | 4 | ) |
7 | x | − | 5 | = | 7 | x | + | 7 | × | 4 |
7 | x | − | 5 | = | 7 | x | + | 28 |
7 | x | − | 7 | x | = | 28 | + | 5 |
0 | x | = | 28 | + | 5 |
0 | x | = | 33 |