| ( | x | − | 1 | ) | ÷ | 3 10 | − | ( | x | + | 2 | ) | ÷ | 1 2 | = | 12 |
| 方程左边 = | x | × | 10 3 | − | 1 | × | 10 3 | − | ( | x | + | 2 | ) | × | 2 |
| = | x | × | 10 3 | − | 10 3 | − | ( | x | + | 2 | ) | × | 2 |
| = | 10 3 | x | − | 10 3 | − | x | × | 2 | − | 2 | × | 2 |
| = | 10 3 | x | − | 10 3 | − | x | × | 2 | − | 4 |
| = | 4 3 | x | − | 22 3 |
4 3 | x | − | 22 3 | = | 12 |
4 3 | x | = | 12 | + | 22 3 |
4 3 | x | = | 58 3 |
| x | = | 58 3 | ÷ | 4 3 |
| = | 58 3 | × | 3 4 |
| = | 29 | × | 1 2 |
| x | = | 29 2 |
| x | = | 14.5 |