| ( | x | − | 17 2 | ) | × | 300 | = | ( | x | − | 252 25 | ) | × | 1600 |
| 方程左边 = | x | × | 300 | − | 17 2 | × | 300 |
| = | x | × | 300 | − | 2550 |
| 300 | x | − | 2550 | = | ( | x | − | 252 25 | ) | × | 1600 |
| 方程右边 = | x | × | 1600 | − | 252 25 | × | 1600 |
| = | x | × | 1600 | − | 16128 |
| 300 | x | − | 2550 | = | 1600 | x | − | 16128 |
| 300 | x | − | 1600 | x | = | - | 16128 | + | 2550 |
| - | 1300 | x | = | - | 16128 | + | 2550 |
| - | 1300 | x | = | - | 13578 |
| 13578 | = | 1300 | x |
| 1300 | x | = | 13578 |
| x | = | 13578 | ÷ | 1300 |
| = | 13578 | × | 1 1300 |
| = | 6789 | × | 1 650 |
| x | = | 6789 650 |
| x | = | 10.444615 |