3 | x | − | 91 | = | 1 | ÷ | 3 | × | ( | 91 | − | x | ) | − | 1 |
方程右边 = | 1 3 | ( | 91 | − | x | ) | − | 1 |
3 | x | − | 91 | = | 1 3 | ( | 91 | − | x | ) | − | 1 |
方程右边 = | 1 3 | × | 91 | − | 1 3 | x | − | 1 |
= | 91 3 | − | 1 3 | x | − | 1 |
= | 88 3 | − | 1 3 | x |
3 | x | − | 91 | = | 88 3 | − | 1 3 | x |
3 | x | + | 1 3 | x | = | 88 3 | + | 91 |
10 3 | x | = | 88 3 | + | 91 |
10 3 | x | = | 361 3 |
x | = | 361 3 | ÷ | 10 3 |
= | 361 3 | × | 3 10 |
= | 361 | × | 1 10 |
x | = | 361 10 |
x | = | 36.1 |