| ( | 100 | + | x | ) | ( | 1000 | − | 2 | x | ) | ÷ | 100 | × | 1000 | = | 19 125 |
| Left side of the equation = | ( | 100 | + | x | ) | ( | 1000 | − | 2 | x | ) | × | 10 |
| ( | 100 | + | x | ) | ( | 1000 | − | 2 | x | ) | × | 10 | = | 19 125 |
| Left side of the equation = | 100 | ( | 1000 | − | 2 | x | ) | × | 10 | + | x | ( | 1000 | − | 2 | x | ) | × | 10 |
| = | 1000 | ( | 1000 | − | 2 | x | ) | + | x | ( | 1000 | − | 2 | x | ) | × | 10 |
| = | 1000 | × | 1000 | − | 1000 | × | 2 | x | + | x | ( | 1000 | − | 2 | x | ) | × | 10 |
| = | 1000000 | − | 2000 | x | + | x | ( | 1000 | − | 2 | x | ) | × | 10 |
| = | 1000000 | − | 2000 | x | + | x | × | 1000 | × | 10 | − | x | × | 2 | x | × | 10 |
| = | 1000000 | − | 2000 | x | + | x | × | 10000 | − | x | × | 20 | x |
| = | 1000000 | + | 8000 | x | − | x | × | 20 | x |
| 1000000 | + | 8000 | x | − | x | × | 20 | x | = | 19 125 |