| 11 | ( | - | 3 | + | 4 | x | ) | = | 5 | ( | - | 3 | + | 7 | x | ) |
| Left side of the equation = | - | 11 | × | 3 | + | 11 | × | 4 | x |
| = | - | 33 | + | 44 | x |
| - | 33 | + | 44 | x | = | 5 | ( | - | 3 | + | 7 | x | ) |
| Right side of the equation = | - | 5 | × | 3 | + | 5 | × | 7 | x |
| = | - | 15 | + | 35 | x |
| - | 33 | + | 44 | x | = | - | 15 | + | 35 | x |
| 44 | x | − | 35 | x | = | - | 15 | + | 33 |
| 9 | x | = | - | 15 | + | 33 |
| 9 | x | = | 18 |
| x | = | 18 | ÷ | 9 |
| = | 18 | × | 1 9 |
| = | 2 | × | 1 |
| x | = | 2 |