| 7200 | ÷ | x | = | ( | 7200 | × | 6 5 | ) | ÷ | 720 | − | 720 |
| Multiply both sides of the equation by: | x |
| 7200 | = | ( | 7200 | × | 6 5 | ) | ÷ | 720 | × | x | − | 720 | x |
| 7200 | = | 7200 | × | 6 5 | ÷ | 720 | × | x | − | 720 | x |
| 7200 | = | 12 | x | − | 720 | x |
| 7200 | = | - | 708 | x |
| 708 | x | = | - | 7200 |
| x | = | - | 7200 | ÷ | 708 |
| = | - | 7200 | × | 1 708 |
| = | - | 600 | × | 1 59 |
| x | = | - | 600 59 |
| x | = | - 10.169492 |