| 14000 | − | ( | 8 | × | 500 | + | 400 | × | 10 | + | ( | 600 | × | 30 | ( | x | ÷ | 10 | ) | − | 20 | × | 600 | ) | ) | = | 3600 |
| 方程左边 = | 14000 | − | 8 | × | 500 | − | 400 | × | 10 | − | ( | 600 | × | 30 | ( | x | ÷ | 10 | ) | − | 20 | × | 600 | ) |
| = | 14000 | − | 4000 | − | 4000 | − | ( | 600 | × | 30 | ( | x | ÷ | 10 | ) | − | 20 | × | 600 | ) |
| = | 6000 | − | ( | 600 | × | 30 | ( | x | ÷ | 10 | ) | − | 20 | × | 600 | ) |
| = | 6000 | − | 600 | × | 30 | ( | x | ÷ | 10 | ) | + | 20 | × | 600 |
| = | 6000 | − | 18000 | ( | x | ÷ | 10 | ) | + | 12000 |
| = | 18000 | − | 18000 | ( | x | ÷ | 10 | ) |
| = | 18000 | − | 18000 | x | ÷ | 10 |
| = | 18000 | − | 1800 | x |
| 18000 | − | 1800 | x | = | 3600 |
| - | 1800 | x | = | 3600 | − | 18000 |
| - | 1800 | x | = | - | 14400 |
| 14400 | = | 1800 | x |
| 1800 | x | = | 14400 |
| x | = | 14400 | ÷ | 1800 |
| = | 14400 | × | 1 1800 |
| = | 8 | × | 1 |
| x | = | 8 |