| ( | x | + | 1 | ) | × | 3 | ÷ | 2 | × | 36 | = | 450 |
| Left side of the equation = | ( | x | + | 1 | ) | × | 54 |
| ( | x | + | 1 | ) | × | 54 | = | 450 |
| Left side of the equation = | x | × | 54 | + | 1 | × | 54 |
| = | x | × | 54 | + | 54 |
| 54 | x | + | 54 | = | 450 |
| 54 | x | = | 450 | − | 54 |
| 54 | x | = | 396 |
| x | = | 396 | ÷ | 54 |
| = | 396 | × | 1 54 |
| = | 22 | × | 1 3 |
| x | = | 22 3 |
| x | = | 7.333333 |