| x | − | x | × | 13 200 | − | ( | x | + | 500000 | ) | × | 3 10000 | = | 500000 |
| 方程左边 = | 187 200 | x | − | ( | x | + | 500000 | ) | × | 3 10000 |
187 200 | x | − | ( | x | + | 500000 | ) | × | 3 10000 | = | 500000 |
| 方程左边 = | 187 200 | x | − | x | × | 3 10000 | − | 500000 | × | 3 10000 |
| = | 187 200 | x | − | x | × | 3 10000 | − | 150 |
| = | 9347 10000 | x | − | 150 |
9347 10000 | x | − | 150 | = | 500000 |
9347 10000 | x | = | 500000 | + | 150 |
9347 10000 | x | = | 500150 |
| x | = | 500150 | ÷ | 9347 10000 |
| = | 500150 | × | 10000 9347 |
| x | = | 5001500000 9347 |
| x | = | 535091.4732 |