| 40 | ÷ | 3 | + | 2 | x | − | ( | 40 | ÷ | 3 | ) | x | + | 4 | x | − | 2 | x | = | 6 |
| 方程左边 = | 40 3 | + | 2 | x | − | ( | 40 | ÷ | 3 | ) | x | + | 4 | x | − | 2 | x |
| = | 40 3 | + | 4 | x | − | ( | 40 | ÷ | 3 | ) | x |
40 3 | + | 4 | x | − | ( | 40 | ÷ | 3 | ) | x | = | 6 |
| 方程左边 = | 40 3 | + | 4 | x | − | 40 | ÷ | 3 | × | x |
| = | 40 3 | + | 4 | x | − | 40 3 | x |
| = | 40 3 | − | 28 3 | x |
40 3 | − | 28 3 | x | = | 6 |
| - | 28 3 | x | = | 6 | − | 40 3 |
| - | 28 3 | x | = | - | 22 3 |
22 3 | = | 28 3 | x |
28 3 | x | = | 22 3 |
| x | = | 22 3 | ÷ | 28 3 |
| = | 22 3 | × | 3 28 |
| = | 11 | × | 1 14 |
| x | = | 11 14 |
| x | = | 0.785714 |