| 5000 | × | 19 20 | = | x | − | ( | 9 10 | x | ) | ÷ | 12 |
| Left side of the equation = | 4750 |
| 4750 | = | x | − | ( | 9 10 | x | ) | ÷ | 12 |
| Right side of the equation = | x | − | 9 10 | x | × | 1 12 |
| = | x | − | 3 40 | x |
| = | 37 40 | x |
| 4750 | = | 37 40 | x |
| - | 37 40 | x | = | - | 4750 |
| 4750 | = | 37 40 | x |
37 40 | x | = | 4750 |
| x | = | 4750 | ÷ | 37 40 |
| = | 4750 | × | 40 37 |
| x | = | 190000 37 |
| x | = | 5135.135135 |