| 1000 | m | × | 50 | = | 1000 | ( | 500 | − | m | ) | × | 10 | − | 3000000 |
| Left side of the equation = | 50000 | m |
| 50000 | m | = | 1000 | ( | 500 | − | m | ) | × | 10 | − | 3000000 |
| Right side of the equation = | 10000 | ( | 500 | − | m | ) | − | 3000000 |
| 50000 | m | = | 10000 | ( | 500 | − | m | ) | − | 3000000 |
| Right side of the equation = | 10000 | × | 500 | − | 10000 | m | − | 3000000 |
| = | 5000000 | − | 10000 | m | − | 3000000 |
| = | 2000000 | − | 10000 | m |
| 50000 | m | = | 2000000 | − | 10000 | m |
| 50000 | m | + | 10000 | m | = | 2000000 |
| 60000 | m | = | 2000000 |
| m | = | 2000000 | ÷ | 60000 |
| = | 2000000 | × | 1 60000 |
| = | 100 | × | 1 3 |
| m | = | 100 3 |
| m | = | 33.333333 |