| x | ÷ | ( | 3 40 | − | x | ) | = | 7 500 |
| Multiply both sides of the equation by: | ( | 3 40 | − | x | ) |
| x | = | 7 500 | ( | 3 40 | − | x | ) |
| x | = | 7 500 | × | 3 40 | − | 7 500 | x |
| x | = | 21 20000 | − | 7 500 | x |
| x | + | 7 500 | x | = | 21 20000 |
507 500 | x | = | 21 20000 |
| x | = | 21 20000 | ÷ | 507 500 |
| = | 21 20000 | × | 500 507 |
| = | 7 40 | × | 1 169 |
| x | = | 7 6760 |
| x | = | 0.001036 |