| x | × | 7000 | − | ( | 7000 | x | × | 17 100 | − | 600 | ) | × | 3 25 | − | 10531 2 | = | 0 |
| 方程左边 = | 7000 | x | − | 7000 | x | × | 17 100 | × | 3 25 | + | 600 | × | 3 25 | − | 10531 2 |
| = | 7000 | x | − | 714 5 | x | + | 72 | − | 10531 2 |
| = | 34286 5 | x | − | 10387 2 |
34286 5 | x | − | 10387 2 | = | 0 |
34286 5 | x | = | 0 | + | 10387 2 |
34286 5 | x | = | 10387 2 |
| x | = | 10387 2 | ÷ | 34286 5 |
| = | 10387 2 | × | 5 34286 |
| x | = | 51935 68572 |
| x | = | 0.757379 |