| x | ÷ | ( | 100 | + | x | ) | = | 397 5000 |
| Multiply both sides of the equation by: | ( | 100 | + | x | ) |
| x | = | 397 5000 | ( | 100 | + | x | ) |
| x | = | 397 5000 | × | 100 | + | 397 5000 | x |
| x | = | 397 50 | + | 397 5000 | x |
| x | − | 397 5000 | x | = | 397 50 |
4603 5000 | x | = | 397 50 |
| x | = | 397 50 | ÷ | 4603 5000 |
| = | 397 50 | × | 5000 4603 |
| = | 397 | × | 100 4603 |
| x | = | 39700 4603 |
| x | = | 8.62481 |