| 2 | ( | x | + | 5 | ) | = | 50 | + | 212 | − | 2 | x |
| Left side of the equation = | 2 | x | + | 2 | × | 5 |
| = | 2 | x | + | 10 |
| 2 | x | + | 10 | = | 50 | + | 212 | − | 2 | x |
| Right side of the equation = | 262 | − | 2 | x |
| 2 | x | + | 10 | = | 262 | − | 2 | x |
| 2 | x | + | 2 | x | = | 262 | − | 10 |
| 4 | x | = | 262 | − | 10 |
| 4 | x | = | 252 |
| x | = | 252 | ÷ | 4 |
| = | 252 | × | 1 4 |
| = | 63 | × | 1 |
| x | = | 63 |