9 50 | X | + | ( | 1 | − | X | ) | × | 13 100 | = | 4 25 |
| Left side of the equation = | 9 50 | X | + | 1 | × | 13 100 | − | X | × | 13 100 |
| = | 9 50 | X | + | 13 100 | − | X | × | 13 100 |
| = | 1 20 | X | + | 13 100 |
1 20 | X | + | 13 100 | = | 4 25 |
1 20 | X | = | 4 25 | − | 13 100 |
1 20 | X | = | 3 100 |
| X | = | 3 100 | ÷ | 1 20 |
| = | 3 100 | × | 20 |
| = | 3 5 | × | 1 |
| X | = | 3 5 |
| X | = | 0.6 |