| x | ÷ | ( | 1 100 | − | x | ) | = | 3 125 |
| Multiply both sides of the equation by: | ( | 1 100 | − | x | ) |
| x | = | 3 125 | ( | 1 100 | − | x | ) |
| x | = | 3 125 | × | 1 100 | − | 3 125 | x |
| x | = | 3 12500 | − | 3 125 | x |
| x | + | 3 125 | x | = | 3 12500 |
128 125 | x | = | 3 12500 |
| x | = | 3 12500 | ÷ | 128 125 |
| = | 3 12500 | × | 125 128 |
| = | 3 100 | × | 1 128 |
| x | = | 3 12800 |
| x | = | 0.000234 |