| 4 | × | 6 | x | + | 4 | × | 4 | ( | 12 | − | x | ) | = | 248 |
| Left side of the equation = | 24 | x | + | 16 | ( | 12 | − | x | ) |
| 24 | x | + | 16 | ( | 12 | − | x | ) | = | 248 |
| Left side of the equation = | 24 | x | + | 16 | × | 12 | − | 16 | x |
| = | 24 | x | + | 192 | − | 16 | x |
| = | 8 | x | + | 192 |
| 8 | x | + | 192 | = | 248 |
| 8 | x | = | 248 | − | 192 |
| 8 | x | = | 56 |
| x | = | 56 | ÷ | 8 |
| = | 56 | × | 1 8 |
| = | 7 | × | 1 |
| x | = | 7 |