3 5 | ( | 1 | + | x | ) | ÷ | 12 | = | 11 100 |
| Left side of the equation = | 1 20 | ( | 1 | + | x | ) |
1 20 | ( | 1 | + | x | ) | = | 11 100 |
| Left side of the equation = | 1 20 | × | 1 | + | 1 20 | x |
| = | 1 20 | + | 1 20 | x |
1 20 | + | 1 20 | x | = | 11 100 |
1 20 | x | = | 11 100 | − | 1 20 |
1 20 | x | = | 3 50 |
| x | = | 3 50 | ÷ | 1 20 |
| = | 3 50 | × | 20 |
| = | 3 5 | × | 2 |
| x | = | 6 5 |
| x | = | 1.2 |