| x | ÷ | 80 | − | 11 | ÷ | 120 | + | x | ÷ | 120 | = | 1 | ÷ | 30 |
| Left side of the equation = | x | × | 1 80 | − | 11 120 | + | x | × | 1 120 |
| = | 1 48 | x | − | 11 120 |
1 48 | x | − | 11 120 | = | 1 | ÷ | 30 |
| Right side of the equation = | 1 30 |
1 48 | x | − | 11 120 | = | 1 30 |
1 48 | x | = | 1 30 | + | 11 120 |
1 48 | x | = | 1 8 |
| x | = | 1 8 | ÷ | 1 48 |
| = | 1 8 | × | 48 |
| = | 1 | × | 6 |
| x | = | 6 |