| 100 | ÷ | 10 | − | 100 | ÷ | x | − | 100 | ÷ | 15 | = | 8300 | − | 0 | − | ( | 8300 | + | 3910 | ) |
| Multiply both sides of the equation by: | x |
| 100 | ÷ | 10 | × | x | − | 100 | − | 100 | ÷ | 15 | × | x | = | 8300 | x | − | 0 | − | ( | 8300 | + | 3910 | ) | x |
| 100 | ÷ | 10 | × | x | − | 100 | − | 100 | ÷ | 15 | × | x | = | 8300 | x | − | 0 | − | 8300 | x | − | 3910 | x |
| 10 | x | − | 100 | − | 20 3 | x | = | 8300 | x | − | 0 | − | 8300 | x | − | 3910 | x |
10 3 | x | − | 100 | = | - | 3910 | x | − | 0 |
10 3 | x | + | 3910 | x | = | 100 |
11740 3 | x | = | 100 |
| x | = | 100 | ÷ | 11740 3 |
| = | 100 | × | 3 11740 |
| = | 5 | × | 3 587 |
| x | = | 15 587 |
| x | = | 0.025554 |