| x | ÷ | ( | 840 | + | x | ) | = | 8 125 |
| Multiply both sides of the equation by: | ( | 840 | + | x | ) |
| x | = | 8 125 | ( | 840 | + | x | ) |
| x | = | 8 125 | × | 840 | + | 8 125 | x |
| x | = | 1344 25 | + | 8 125 | x |
| x | − | 8 125 | x | = | 1344 25 |
117 125 | x | = | 1344 25 |
| x | = | 1344 25 | ÷ | 117 125 |
| = | 1344 25 | × | 125 117 |
| = | 448 | × | 5 39 |
| x | = | 2240 39 |
| x | = | 57.435897 |