| 5 | ( | x | + | 2 | ) | = | 2 | ( | x | × | 1 | − | 4 | ) |
| Left side of the equation = | 5 | x | + | 5 | × | 2 |
| = | 5 | x | + | 10 |
| 5 | x | + | 10 | = | 2 | ( | x | × | 1 | − | 4 | ) |
| Right side of the equation = | 2 | x | × | 1 | − | 2 | × | 4 |
| = | 2 | x | − | 8 |
| 5 | x | + | 10 | = | 2 | x | − | 8 |
| 5 | x | − | 2 | x | = | - | 8 | − | 10 |
| 3 | x | = | - | 8 | − | 10 |
| 3 | x | = | - | 18 |
| x | = | - | 18 | ÷ | 3 |
| = | - | 18 | × | 1 3 |
| = | - | 6 | × | 1 |
| x | = | - | 6 |