| 100 | x | − | ( | x | × | 13 100 | − | 5 | ) | × | 3 25 | x | − | ( | 580 | + | 40 | x | ) | = | 0 |
| Left side of the equation = | 100 | x | − | x | × | 13 100 | × | 3 25 | x | + | 5 | × | 3 25 | x | − | ( | 580 | + | 40 | x | ) |
| = | 100 | x | − | x | × | 39 2500 | x | + | 3 5 | x | − | ( | 580 | + | 40 | x | ) |
| = | 503 5 | x | − | x | × | 39 2500 | x | − | ( | 580 | + | 40 | x | ) |
| = | 503 5 | x | − | x | × | 39 2500 | x | − | 580 | − | 40 | x |
| = | 303 5 | x | − | x | × | 39 2500 | x | − | 580 |
303 5 | x | − | x | × | 39 2500 | x | − | 580 | = | 0 |