( | ( | x | + | 4 | ) | ÷ | 7 | − | 5 | ) | × | 3 | = | x |
方程左边 = | ( | x | + | 4 | ) | ÷ | 7 | × | 3 | − | 5 | × | 3 |
= | ( | x | + | 4 | ) | × | 3 7 | − | 15 |
= | x | × | 3 7 | + | 4 | × | 3 7 | − | 15 |
= | x | × | 3 7 | + | 12 7 | − | 15 |
= | 3 7 | x | − | 93 7 |
3 7 | x | − | 93 7 | = | x |
3 7 | x | − | x | = | 93 7 |
- | 4 7 | x | = | 93 7 |
- | 93 7 | = | 4 7 | x |
4 7 | x | = | - | 93 7 |
x | = | - | 93 7 | ÷ | 4 7 |
= | - | 93 7 | × | 7 4 |
= | - | 93 | × | 1 4 |
x | = | - | 93 4 |
x | = | - 23.25 |