| 5 | ( | 2 | x | − | 1 | ) | = | 2 | ( | 1 | + | 2 | x | ) | + | x | − | 2 |
| Left side of the equation = | 5 | × | 2 | x | − | 5 | × | 1 |
| = | 10 | x | − | 5 |
| 10 | x | − | 5 | = | 2 | ( | 1 | + | 2 | x | ) | + | x | − | 2 |
| Right side of the equation = | 2 | × | 1 | + | 2 | × | 2 | x | + | x | − | 2 |
| = | 2 | + | 4 | x | + | x | − | 2 |
| = | 0 | + | 5 | x |
| 10 | x | − | 5 | = | 5 | x |
| 10 | x | − | 5 | x | = | 5 |
| 5 | x | = | 5 |
| x | = | 5 | ÷ | 5 |
| = | 5 | × | 1 5 |
| = | 1 | × | 1 |
| x | = | 1 |