| X | ( | 1 | − | 4 | ÷ | 1 | ) | + | 63 | = | X | ( | 1 | + | 5 | ÷ | 1 | ) |
| Left side of the equation = | X | × | 1 | − | X | × | 4 | ÷ | 1 | + | 63 |
| = | X | × | 1 | − | X | × | 4 | + | 63 |
| = | - | 3 | X | + | 63 |
| - | 3 | X | + | 63 | = | X | ( | 1 | + | 5 | ÷ | 1 | ) |
| Right side of the equation = | X | × | 1 | + | X | × | 5 | ÷ | 1 |
| = | X | × | 1 | + | X | × | 5 |
| = | 6 | X |
| - | 3 | X | + | 63 | = | 6 | X |
| - | 3 | X | − | 6 | X | = | - | 63 |
| - | 9 | X | = | - | 63 |
| 63 | = | 9 | X |
| 9 | X | = | 63 |
| X | = | 63 | ÷ | 9 |
| = | 63 | × | 1 9 |
| = | 7 | × | 1 |
| X | = | 7 |