| ( | X | − | 1 4 | X | − | 3 10 | X | − | 5000 | ) | ÷ | X | = | 9 25 |
| Multiply both sides of the equation by: | X |
| ( | X | − | 1 4 | X | − | 3 10 | X | − | 5000 | ) | = | 9 25 | X |
| X | − | 1 4 | X | − | 3 10 | X | − | 5000 | = | 9 25 | X |
9 20 | X | − | 5000 | = | 9 25 | X |
9 20 | X | − | 9 25 | X | = | 5000 |
9 100 | X | = | 5000 |
| X | = | 5000 | ÷ | 9 100 |
| = | 5000 | × | 100 9 |
| X | = | 500000 9 |
| X | = | 55555.555556 |