| ( | 8300 | × | 780 | + | 3000 | x | ) | ÷ | ( | 8300 | + | x | ) | = | 1000 |
| Multiply both sides of the equation by: | ( | 8300 | + | x | ) |
| ( | 8300 | × | 780 | + | 3000 | x | ) | = | 1000 | ( | 8300 | + | x | ) |
| 8300 | × | 780 | + | 3000 | x | = | 1000 | ( | 8300 | + | x | ) |
| 8300 | × | 780 | + | 3000 | x | = | 1000 | × | 8300 | + | 1000 | x |
| 6474000 | + | 3000 | x | = | 8300000 | + | 1000 | x |
| 3000 | x | − | 1000 | x | = | 8300000 | − | 6474000 |
| 2000 | x | = | 8300000 | − | 6474000 |
| 2000 | x | = | 1826000 |
| x | = | 1826000 | ÷ | 2000 |
| = | 1826000 | × | 1 2000 |
| = | 913 | × | 1 |
| x | = | 913 |