| 24 | x | + | 12 | × | 5 | = | 4 | ( | 5 | x | + | 45 | ) |
| Left side of the equation = | 24 | x | + | 60 |
| 24 | x | + | 60 | = | 4 | ( | 5 | x | + | 45 | ) |
| Right side of the equation = | 4 | × | 5 | x | + | 4 | × | 45 |
| = | 20 | x | + | 180 |
| 24 | x | + | 60 | = | 20 | x | + | 180 |
| 24 | x | − | 20 | x | = | 180 | − | 60 |
| 4 | x | = | 180 | − | 60 |
| 4 | x | = | 120 |
| x | = | 120 | ÷ | 4 |
| = | 120 | × | 1 4 |
| = | 30 | × | 1 |
| x | = | 30 |