| 2 | − | 9 | ( | k | + | 1 | ) | ÷ | 4 | × | k | = | - | 3 | ÷ | 2 |
| Left side of the equation = | 2 | − | 9 4 | ( | k | + | 1 | ) | k |
| 2 | − | 9 4 | ( | k | + | 1 | ) | k | = | - | 3 | ÷ | 2 |
| Left side of the equation = | 2 | − | 9 4 | k | k | − | 9 4 | × | 1 | k |
| = | 2 | − | 9 4 | k | k | − | 9 4 | k |
| 2 | − | 9 4 | k | k | − | 9 4 | k | = | - | 3 | ÷ | 2 |
| Right side of the equation = | - | 3 2 |
| 2 | − | 9 4 | k | k | − | 9 4 | k | = | - | 3 2 |