| X | + | 5 4 | X | + | 3 4 | ( | 224 5 | − | X | ) | = | 448 |
| Left side of the equation = | 9 4 | X | + | 3 4 | ( | 224 5 | − | X | ) |
9 4 | X | + | 3 4 | ( | 224 5 | − | X | ) | = | 448 |
| Left side of the equation = | 9 4 | X | + | 3 4 | × | 224 5 | − | 3 4 | X |
| = | 9 4 | X | + | 168 5 | − | 3 4 | X |
| = | 3 2 | X | + | 168 5 |
3 2 | X | + | 168 5 | = | 448 |
3 2 | X | = | 448 | − | 168 5 |
3 2 | X | = | 2072 5 |
| X | = | 2072 5 | ÷ | 3 2 |
| = | 2072 5 | × | 2 3 |
| X | = | 4144 15 |
| X | = | 276.266667 |