| ( | 500 | + | m | ) | ÷ | ( | 600 | + | m | ) | = | 11 | ÷ | 10 |
| Multiply both sides of the equation by: | ( | 600 | + | m | ) |
| ( | 500 | + | m | ) | = | 11 | ÷ | 10 | × | ( | 600 | + | m | ) |
| 500 | + | m | = | 11 | ÷ | 10 | × | ( | 600 | + | m | ) |
| 500 | + | m | = | 11 | ÷ | 10 | × | 600 | + | 11 | ÷ | 10 | × | m |
| 500 | + | m | = | 660 | + | 11 10 | m |
| m | − | 11 10 | m | = | 660 | − | 500 |
| - | 1 10 | m | = | 660 | − | 500 |
| - | 1 10 | m | = | 160 |
| - | 160 | = | 1 10 | m |
1 10 | m | = | - | 160 |
| m | = | - | 160 | ÷ | 1 10 |
| = | - | 160 | × | 10 |
| m | = | - | 1600 |