| 1800 | + | x | ÷ | 3 | = | 5 | x | + | ( | 5 | ( | x | ÷ | 3 | ) | ) |
| Right side of the equation = | 5 | x | + | 5 | ( | x | ÷ | 3 | ) |
| = | 5 | x | + | 5 | x | ÷ | 3 |
| = | 5 | x | + | 5 3 | x |
| = | 20 3 | x |
| 1800 | + | 1 3 | x | = | 20 3 | x |
1 3 | x | − | 20 3 | x | = | - | 1800 |
| - | 19 3 | x | = | - | 1800 |
| 1800 | = | 19 3 | x |
19 3 | x | = | 1800 |
| x | = | 1800 | ÷ | 19 3 |
| = | 1800 | × | 3 19 |
| x | = | 5400 19 |
| x | = | 284.210526 |