| 66 | ( | 162 | + | x | ) | = | 309 500 |
| Left side of the equation = | 66 | × | 162 | + | 66 | x |
| = | 10692 | + | 66 | x |
| 10692 | + | 66 | x | = | 309 500 |
| 66 | x | = | 309 500 | − | 10692 |
| 66 | x | = | - | 5345691 500 |
| x | = | - | 5345691 500 | ÷ | 66 |
| = | - | 5345691 500 | × | 1 66 |
| = | - | 1781897 500 | × | 1 22 |
| x | = | - | 1781897 11000 |
| x | = | - 161.990636 |