| ( | 1 | + | 1 | ÷ | 2 | ) | ( | 3 | ÷ | 2 | + | ( | 2 | ÷ | 3 | + | X | ÷ | 3 | ) | ) | = | 15 | ÷ | 4 |
| Left side of the equation = | 1 | ( | 3 | ÷ | 2 | + | ( | 2 | ÷ | 3 | + | X | ÷ | 3 | ) | ) | + | 1 | ÷ | 2 | × | ( | 3 | ÷ | 2 | + | ( | 2 | ÷ | 3 | + | X | ÷ | 3 | ) | ) |
| = | 1 | ( | 3 | ÷ | 2 | + | ( | 2 | ÷ | 3 | + | X | ÷ | 3 | ) | ) | + | 1 2 | ( | 3 | ÷ | 2 | + | ( | 2 | ÷ | 3 | + | X | ÷ | 3 | ) | ) |
| = | 1 | × | 3 | ÷ | 2 | + | 1 | ( | 2 | ÷ | 3 | + | X | ÷ | 3 | ) | + | 1 2 | ( | 3 | ÷ | 2 | + | ( | 2 | ÷ | 3 | + | X | ÷ | 3 | ) | ) |
| = | 3 2 | + | 1 | ( | 2 | ÷ | 3 | + | X | ÷ | 3 | ) | + | 1 2 | ( | 3 | ÷ | 2 | + | ( | 2 | ÷ | 3 | + | X | ÷ | 3 | ) | ) |
| = | 3 2 | + | 1 | × | 2 | ÷ | 3 | + | 1 | X | ÷ | 3 | + | 1 2 | ( | 3 | ÷ | 2 | + | ( | 2 | ÷ | 3 | + | X | ÷ | 3 | ) | ) |
| = | 3 2 | + | 2 3 | + | 1 3 | X | + | 1 2 | ( | 3 | ÷ | 2 | + | ( | 2 | ÷ | 3 | + | X | ÷ | 3 | ) | ) |
| = | 13 6 | + | 1 3 | X | + | 1 2 | ( | 3 | ÷ | 2 | + | ( | 2 | ÷ | 3 | + | X | ÷ | 3 | ) | ) |
| = | 13 6 | + | 1 3 | X | + | 1 2 | × | 3 | ÷ | 2 | + | 1 2 | ( | 2 | ÷ | 3 | + | X | ÷ | 3 | ) |
| = | 13 6 | + | 1 3 | X | + | 3 4 | + | 1 2 | ( | 2 | ÷ | 3 | + | X | ÷ | 3 | ) |
| = | 35 12 | + | 1 3 | X | + | 1 2 | ( | 2 | ÷ | 3 | + | X | ÷ | 3 | ) |
| = | 35 12 | + | 1 3 | X | + | 1 2 | × | 2 | ÷ | 3 | + | 1 2 | X | ÷ | 3 |
| = | 35 12 | + | 1 3 | X | + | 1 3 | + | 1 6 | X |
| = | 13 4 | + | 1 2 | X |
13 4 | + | 1 2 | X | = | 15 | ÷ | 4 |
| Right side of the equation = | 15 4 |
13 4 | + | 1 2 | X | = | 15 4 |
1 2 | X | = | 15 4 | − | 13 4 |
1 2 | X | = | 1 2 |
| X | = | 1 2 | ÷ | 1 2 |
| = | 1 2 | × | 2 |
| = | 1 | × | 1 |
| X | = | 1 |