| 4 | q | + | 2 | − | ( | q | + | 8 | ) | = | 2 | q | + | 10 | − | ( | 4 | q | + | 2 | ) |
| Left side of the equation = | 4 | q | + | 2 | − | q | − | 8 |
| = | 3 | q | − | 6 |
| 3 | q | − | 6 | = | 2 | q | + | 10 | − | ( | 4 | q | + | 2 | ) |
| Right side of the equation = | 2 | q | + | 10 | − | 4 | q | − | 2 |
| = | - | 2 | q | + | 8 |
| 3 | q | − | 6 | = | - | 2 | q | + | 8 |
| 3 | q | + | 2 | q | = | 8 | + | 6 |
| 5 | q | = | 8 | + | 6 |
| 5 | q | = | 14 |
| q | = | 14 | ÷ | 5 |
| = | 14 | × | 1 5 |
| q | = | 14 5 |
| q | = | 2.8 |