| X | + | 3 2 | ( | 20 | ÷ | 65 | ) | X | + | 5 2 | ( | 15 | ÷ | 65 | ) | X | = | 1166 |
| Left side of the equation = | X | + | 3 2 | × | 20 | ÷ | 65 | × | X | + | 5 2 | ( | 15 | ÷ | 65 | ) | X |
| = | X | + | 6 13 | X | + | 5 2 | ( | 15 | ÷ | 65 | ) | X |
| = | 19 13 | X | + | 5 2 | ( | 15 | ÷ | 65 | ) | X |
| = | 19 13 | X | + | 5 2 | × | 15 | ÷ | 65 | × | X |
| = | 19 13 | X | + | 15 26 | X |
| = | 53 26 | X |
53 26 | X | = | 1166 |
| X | = | 1166 | ÷ | 53 26 |
| = | 1166 | × | 26 53 |
| = | 22 | × | 26 |
| X | = | 572 |