| x | + | ( | x | + | 4500 | ) | = | 1 | ÷ | 20 |
| Left side of the equation = | x | + | x | + | 4500 |
| = | 2 | x | + | 4500 |
| 2 | x | + | 4500 | = | 1 | ÷ | 20 |
| Right side of the equation = | 1 20 |
| 2 | x | + | 4500 | = | 1 20 |
| 2 | x | = | 1 20 | − | 4500 |
| 2 | x | = | - | 89999 20 |
| x | = | - | 89999 20 | ÷ | 2 |
| = | - | 89999 20 | × | 1 2 |
| x | = | - | 89999 40 |
| x | = | - 2249.975 |