| X | + | 250 | + | ( | X | + | 250 | ) | ÷ | 15 4 | = | 600 |
| Left side of the equation = | X | + | 250 | + | X | × | 4 15 | + | 250 | × | 4 15 |
| = | X | + | 250 | + | X | × | 4 15 | + | 200 3 |
| = | 19 15 | X | + | 950 3 |
19 15 | X | + | 950 3 | = | 600 |
19 15 | X | = | 600 | − | 950 3 |
19 15 | X | = | 850 3 |
| X | = | 850 3 | ÷ | 19 15 |
| = | 850 3 | × | 15 19 |
| = | 850 | × | 5 19 |
| X | = | 4250 19 |
| X | = | 223.684211 |