1 5 | d | d | d | ( | 1 | − | 60 | × | 60 | × | 60 | × | 60 | ÷ | d | ÷ | d | ÷ | d | ÷ | d | ) | = | 20000 |
1 5 | d | d | d | × | 1 | − | 1 5 | d | d | d | × | 60 | × | 60 | × | 60 | = | 20000 |
1 5 | d | d | d | − | 2592000 | d | d | d | ÷ | d | ÷ | d | ÷ | d | ÷ | d | = | 20000 |
| Multiply both sides of the equation by: | d |
1 5 | d | d | d | d | − | 2592000 | × | 1 | × | 1 | d | ÷ | 1 | ÷ | 1 | ÷ | d | = | 20000 | d |