| X | + | 250 | + | ( | X | + | 250 | ) | ÷ | 15 2 | = | 600 |
| Left side of the equation = | X | + | 250 | + | X | × | 2 15 | + | 250 | × | 2 15 |
| = | X | + | 250 | + | X | × | 2 15 | + | 100 3 |
| = | 17 15 | X | + | 850 3 |
17 15 | X | + | 850 3 | = | 600 |
17 15 | X | = | 600 | − | 850 3 |
17 15 | X | = | 950 3 |
| X | = | 950 3 | ÷ | 17 15 |
| = | 950 3 | × | 15 17 |
| = | 950 | × | 5 17 |
| X | = | 4750 17 |
| X | = | 279.411765 |