| X | + | 5 4 | X | + | 3 4 | ( | X | − | 224 5 | ) | = | 448 |
| Left side of the equation = | 9 4 | X | + | 3 4 | ( | X | − | 224 5 | ) |
9 4 | X | + | 3 4 | ( | X | − | 224 5 | ) | = | 448 |
| Left side of the equation = | 9 4 | X | + | 3 4 | X | − | 3 4 | × | 224 5 |
| = | 9 4 | X | + | 3 4 | X | − | 168 5 |
| = | 3 | X | − | 168 5 |
| 3 | X | − | 168 5 | = | 448 |
| 3 | X | = | 448 | + | 168 5 |
| 3 | X | = | 2408 5 |
| X | = | 2408 5 | ÷ | 3 |
| = | 2408 5 | × | 1 3 |
| X | = | 2408 15 |
| X | = | 160.533333 |