| 500 | = | X | ( | 1 | − | 3 100 | ) | ÷ | 12 | × | 200 |
| Right side of the equation = | X | ( | 1 | − | 3 100 | ) | × | 50 3 |
| 500 | = | X | ( | 1 | − | 3 100 | ) | × | 50 3 |
| Right side of the equation = | X | × | 1 | × | 50 3 | − | X | × | 3 100 | × | 50 3 |
| = | X | × | 50 3 | − | X | × | 1 2 |
| = | 97 6 | X |
| 500 | = | 97 6 | X |
| - | 97 6 | X | = | - | 500 |
| 500 | = | 97 6 | X |
97 6 | X | = | 500 |
| X | = | 500 | ÷ | 97 6 |
| = | 500 | × | 6 97 |
| X | = | 3000 97 |
| X | = | 30.927835 |