| ( | x | + | 18250 | ) | + | ( | x | + | 18250 | ) | × | 3 50 | = | 30000 |
| 方程左边 = | x | + | 18250 | + | ( | x | + | 18250 | ) | × | 3 50 |
| = | x | + | 18250 | + | x | × | 3 50 | + | 18250 | × | 3 50 |
| = | x | + | 18250 | + | x | × | 3 50 | + | 1095 |
| = | 53 50 | x | + | 19345 |
53 50 | x | + | 19345 | = | 30000 |
53 50 | x | = | 30000 | − | 19345 |
53 50 | x | = | 10655 |
| x | = | 10655 | ÷ | 53 50 |
| = | 10655 | × | 50 53 |
| x | = | 532750 53 |
| x | = | 10051.886792 |