| x | + | 1 | = | ( | ( | 2 | x | + | 4 | ) | − | ( | x | + | 1 | ) | × | 3 | ) |
| Right side of the equation = | ( | 2 | x | + | 4 | ) | − | ( | x | + | 1 | ) | × | 3 |
| = | 2 | x | + | 4 | − | ( | x | + | 1 | ) | × | 3 |
| = | 2 | x | + | 4 | − | x | × | 3 | − | 1 | × | 3 |
| = | 2 | x | + | 4 | − | x | × | 3 | − | 3 |
| = | - | 1 | x | + | 1 |
| x | + | 1 | = | - | 1 | x | + | 1 |
| x | + | 1 | x | = | 1 | − | 1 |
| 2 | x | = | 1 | − | 1 |
| 2 | x | = | 0 |
| x | = | 0 | ÷ | 2 |
| = | 0 | × | 1 2 |
| x | = | 0 |