| a | ÷ | 8000 | = | a | − | 10 | ÷ | 6000 |
| Right side of the equation = | a | − | 1 600 |
1 8000 | a | = | a | − | 1 600 |
1 8000 | a | − | a | = | - | 1 600 |
| - | 7999 8000 | a | = | - | 1 600 |
1 600 | = | 7999 8000 | a |
7999 8000 | a | = | 1 600 |
| a | = | 1 600 | ÷ | 7999 8000 |
| = | 1 600 | × | 8000 7999 |
| = | 1 3 | × | 40 7999 |
| a | = | 40 23997 |
| a | = | 0.001667 |