| 56 | x | ( | 1 | + | 13 100 | ) | − | 580 | − | 40 | x | − | ( | 56 | x | − | 5 | x | ) | ( | 1 | + | 12 100 | ) | = | 0 |
| 方程左边 = | 56 | x | × | 1 | + | 56 | x | × | 13 100 | − | 580 | − | 40 | x | − | ( | 56 | x | − | 5 | x | ) | ( | 1 | + | 12 100 | ) |
| = | 56 | x | + | 182 25 | x | − | 580 | − | 40 | x | − | ( | 56 | x | − | 5 | x | ) | ( | 1 | + | 12 100 | ) |
| = | 582 25 | x | − | 580 | − | ( | 56 | x | − | 5 | x | ) | ( | 1 | + | 12 100 | ) |
| = | 582 25 | x | − | 580 | − | 56 | x | ( | 1 | + | 12 100 | ) | + | 5 | x | ( | 1 | + | 12 100 | ) |
| = | 582 25 | x | − | 580 | − | 56 | x | × | 1 | − | 56 | x | × | 12 100 | + | 5 | x | ( | 1 | + | 12 100 | ) |
| = | 582 25 | x | − | 580 | − | 56 | x | − | 168 25 | x | + | 5 | x | ( | 1 | + | 12 100 | ) |
| = | - | 986 25 | x | − | 580 | + | 5 | x | ( | 1 | + | 12 100 | ) |
| = | - | 986 25 | x | − | 580 | + | 5 | x | × | 1 | + | 5 | x | × | 12 100 |
| = | - | 986 25 | x | − | 580 | + | 5 | x | + | 3 5 | x |
| = | - | 846 25 | x | − | 580 |
| - | 846 25 | x | − | 580 | = | 0 |
| - | 846 25 | x | = | 0 | + | 580 |
| - | 846 25 | x | = | 580 |
| - | 580 | = | 846 25 | x |
846 25 | x | = | - | 580 |
| x | = | - | 580 | ÷ | 846 25 |
| = | - | 580 | × | 25 846 |
| = | - | 290 | × | 25 423 |
| x | = | - | 7250 423 |
| x | = | - 17.13948 |