| 6400 | x | = | ( | 2500 | − | x | ) | × | 674 | + | ( | 5000 | − | 4 | x | ) | × | 270 |
| 方程右边 = | 2500 | × | 674 | − | x | × | 674 | + | ( | 5000 | − | 4 | x | ) | × | 270 |
| = | 1685000 | − | x | × | 674 | + | ( | 5000 | − | 4 | x | ) | × | 270 |
| = | 1685000 | − | 674 | x | + | 5000 | × | 270 | − | 4 | x | × | 270 |
| = | 1685000 | − | 674 | x | + | 1350000 | − | 1080 | x |
| = | 3035000 | − | 1754 | x |
| 6400 | x | = | 3035000 | − | 1754 | x |
| 6400 | x | + | 1754 | x | = | 3035000 |
| 8154 | x | = | 3035000 |
| x | = | 3035000 | ÷ | 8154 |
| = | 3035000 | × | 1 8154 |
| = | 1517500 | × | 1 4077 |
| x | = | 1517500 4077 |
| x | = | 372.209958 |