| x | = | 453 | × | 4 25 | x | + | 4 25 | ( | x | − | 453 | × | 4 25 | x | ) |
| 方程右边 = | 1812 25 | x | + | 4 25 | ( | x | − | 453 | × | 4 25 | x | ) |
| x | = | 1812 25 | x | + | 4 25 | ( | x | − | 453 | × | 4 25 | x | ) |
| 方程右边 = | 1812 25 | x | + | 4 25 | x | − | 4 25 | × | 453 | × | 4 25 | x |
| = | 1812 25 | x | + | 4 25 | x | − | 7248 625 | x |
| = | 38152 625 | x |
| x | = | 38152 625 | x |
| x | − | 38152 625 | x | = | 0 |
| - | 37527 625 | x | = | 0 |
| - | 0 | = | 37527 625 | x |
37527 625 | x | = | - | 0 |
| x | = | - | 0 | ÷ | 37527 625 |
| = | - | 0 | × | 625 37527 |
| x | = | 0 |