| x | = | 1500 | + | ( | ( | x | − | 4 5 | ) | × | 1 5 | ) |
| 方程右边 = | 1500 | + | ( | x | − | 4 5 | ) | × | 1 5 |
| = | 1500 | + | x | × | 1 5 | − | 4 5 | × | 1 5 |
| = | 1500 | + | x | × | 1 5 | − | 4 25 |
| = | 37496 25 | + | 1 5 | x |
| x | = | 37496 25 | + | 1 5 | x |
| x | − | 1 5 | x | = | 37496 25 |
4 5 | x | = | 37496 25 |
| x | = | 37496 25 | ÷ | 4 5 |
| = | 37496 25 | × | 5 4 |
| = | 9374 5 | × | 1 |
| x | = | 9374 5 |
| x | = | 1874.8 |