| x | + | ( | x | + | 300 | ) | = | 10 | x | + | 6 5 | x |
| Left side of the equation = | x | + | x | + | 300 |
| = | 2 | x | + | 300 |
| 2 | x | + | 300 | = | 10 | x | + | 6 5 | x |
| Right side of the equation = | 56 5 | x |
| 2 | x | + | 300 | = | 56 5 | x |
| 2 | x | − | 56 5 | x | = | - | 300 |
| - | 46 5 | x | = | - | 300 |
| 300 | = | 46 5 | x |
46 5 | x | = | 300 |
| x | = | 300 | ÷ | 46 5 |
| = | 300 | × | 5 46 |
| = | 150 | × | 5 23 |
| x | = | 750 23 |
| x | = | 32.608696 |