| 108 | × | 1 20 | + | 8 | × | 1 20 | − | 1 10 | ( | x | − | 1 5 | ) | = | 287 50 |
| 108 | × | 1 20 | + | 8 | × | 1 20 | − | 1 10 | x | + | 1 10 | × | 1 5 | = | 287 50 |
27 5 | + | 2 5 | − | 1 10 | x | + | 1 50 | = | 287 50 |
291 50 | − | 1 10 | x | = | 287 50 |
| - | 1 10 | x | = | 287 50 | − | 291 50 |
| - | 1 10 | x | = | - | 2 25 |
2 25 | = | 1 10 | x |
1 10 | x | = | 2 25 |
| x | = | 2 25 | ÷ | 1 10 |
| = | 2 25 | × | 10 |
| = | 2 5 | × | 2 |
| x | = | 4 5 |
| x | = | 0.8 |