| ( | 594000 | − | 70 | × | 15 | x | × | 22 500 | ) | ÷ | 30 100 | × | 15 | x | + | 15 | x | × | 3 100 | = | 19 500 |
| 方程左边 = | ( | 594000 | − | 70 | × | 15 | x | × | 22 500 | ) | × | 50 | x | + | 9 20 | x |
| ( | 594000 | − | 70 | × | 15 | x | × | 22 500 | ) | × | 50 | x | + | 9 20 | x | = | 19 500 |
| 方程左边 = | 594000 | × | 50 | x | − | 70 | × | 15 | x | × | 22 500 | × | 50 | x | + | 9 20 | x |
| = | 29700000 | x | − | 2310 | x | x | + | 9 20 | x |
| = | 594000009 20 | x | − | 2310 | x | x |
594000009 20 | x | − | 2310 | x | x | = | 19 500 |