| 10 | ( | x | + | 4 | ) | ÷ | 2 | − | 10 | ( | x | − | 3 | ) | ÷ | 5 | = | - | 16 |
| Left side of the equation = | 5 | ( | x | + | 4 | ) | − | 2 | ( | x | − | 3 | ) |
| 5 | ( | x | + | 4 | ) | − | 2 | ( | x | − | 3 | ) | = | - | 16 |
| Left side of the equation = | 5 | x | + | 5 | × | 4 | − | 2 | ( | x | − | 3 | ) |
| = | 5 | x | + | 20 | − | 2 | ( | x | − | 3 | ) |
| = | 5 | x | + | 20 | − | 2 | x | + | 2 | × | 3 |
| = | 5 | x | + | 20 | − | 2 | x | + | 6 |
| = | 3 | x | + | 26 |
| 3 | x | + | 26 | = | - | 16 |
| 3 | x | = | - | 16 | − | 26 |
| 3 | x | = | - | 42 |
| x | = | - | 42 | ÷ | 3 |
| = | - | 42 | × | 1 3 |
| = | - | 14 | × | 1 |
| x | = | - | 14 |