| x | ÷ | 1 20 | × | 2 | = | 4500 | − | x | ÷ | 1 50 | × | 4 |
| Left side of the equation = | x | × | 40 |
| 40 | x | = | 4500 | − | x | ÷ | 1 50 | × | 4 |
| Right side of the equation = | 4500 | − | x | × | 200 |
| 40 | x | = | 4500 | − | 200 | x |
| 40 | x | + | 200 | x | = | 4500 |
| 240 | x | = | 4500 |
| x | = | 4500 | ÷ | 240 |
| = | 4500 | × | 1 240 |
| = | 75 | × | 1 4 |
| x | = | 75 4 |
| x | = | 18.75 |