| ( | 2 | + | 66 25 | ) | ÷ | 2 | × | 4 5 | X | = | 18 |
| Left side of the equation = | ( | 2 | + | 66 25 | ) | × | 2 5 | X |
| ( | 2 | + | 66 25 | ) | × | 2 5 | X | = | 18 |
| Left side of the equation = | 2 | × | 2 5 | X | + | 66 25 | × | 2 5 | X |
| = | 4 5 | X | + | 132 125 | X |
| = | 232 125 | X |
232 125 | X | = | 18 |
| X | = | 18 | ÷ | 232 125 |
| = | 18 | × | 125 232 |
| = | 9 | × | 125 116 |
| X | = | 1125 116 |
| X | = | 9.698276 |