| 11 | ( | 600 | + | m | ) | = | 10 | ( | 500 | + | m | ) |
| Left side of the equation = | 11 | × | 600 | + | 11 | m |
| = | 6600 | + | 11 | m |
| 6600 | + | 11 | m | = | 10 | ( | 500 | + | m | ) |
| Right side of the equation = | 10 | × | 500 | + | 10 | m |
| = | 5000 | + | 10 | m |
| 6600 | + | 11 | m | = | 5000 | + | 10 | m |
| 11 | m | − | 10 | m | = | 5000 | − | 6600 |
| m | = | 5000 | − | 6600 |
| m | = | 5000 | − | 6600 |
| m | = | - | 1600 |