| x | − | x | ÷ | 21 20 | × | 1 50 | − | 1 10 | x | + | x | ÷ | 21 20 | × | 1 500 | + | x | ÷ | 21 20 | × | 1 200 | = | 5000 |
| 方程左边 = | x | − | x | × | 2 105 | − | 1 10 | x | + | x | × | 1 525 | + | x | × | 1 210 | + | 80 |
| = | 466 525 | x | + | 80 |
466 525 | x | + | 80 | = | 5000 |
466 525 | x | = | 5000 | − | 80 |
466 525 | x | = | 4920 |
| x | = | 4920 | ÷ | 466 525 |
| = | 4920 | × | 525 466 |
| = | 2460 | × | 525 233 |
| x | = | 1291500 233 |
| x | = | 5542.918455 |