| 24 | × | 280 | = | 133 | × | 13 | + | 100 | x |
| Left side of the equation = | 6720 |
| 6720 | = | 133 | × | 13 | + | 100 | x |
| Right side of the equation = | 1729 | + | 100 | x |
| 6720 | = | 1729 | + | 100 | x |
| - | 100 | x | = | 1729 | − | 6720 |
| - | 100 | x | = | - | 4991 |
| 4991 | = | 100 | x |
| 100 | x | = | 4991 |
| x | = | 4991 | ÷ | 100 |
| = | 4991 | × | 1 100 |
| x | = | 4991 100 |
| x | = | 49.91 |