| ( | ( | x | + | 40 | ) | × | 460 | ) | ÷ | 50000 | = | 0 |
| Left side of the equation = | ( | x | + | 40 | ) | × | 460 | × | 1 50000 |
| = | ( | x | + | 40 | ) | × | 23 2500 |
| = | x | × | 23 2500 | + | 40 | × | 23 2500 |
| = | x | × | 23 2500 | + | 46 125 |
23 2500 | x | + | 46 125 | = | 0 |
23 2500 | x | = | 0 | − | 46 125 |
23 2500 | x | = | - | 46 125 |
| x | = | - | 46 125 | ÷ | 23 2500 |
| = | - | 46 125 | × | 2500 23 |
| = | - | 2 | × | 20 |
| x | = | - | 40 |