| ( | 5 | − | U | ) | ÷ | 10 | + | ( | 12 | − | U | ) | ÷ | 1 | = | U | ÷ | 10 |
| Left side of the equation = | 5 | × | 1 10 | − | U | × | 1 10 | + | ( | 12 | − | U | ) | × | 1 |
| = | 1 2 | − | U | × | 1 10 | + | ( | 12 | − | U | ) | × | 1 |
| = | 1 2 | − | 1 10 | U | + | 12 | × | 1 | − | U | × | 1 |
| = | 1 2 | − | 1 10 | U | + | 12 | − | U | × | 1 |
| = | 25 2 | − | 11 10 | U |
25 2 | − | 11 10 | U | = | U | ÷ | 10 |
| - | 11 10 | U | − | 1 10 | U | = | - | 25 2 |
| - | 6 5 | U | = | - | 25 2 |
25 2 | = | 6 5 | U |
6 5 | U | = | 25 2 |
| U | = | 25 2 | ÷ | 6 5 |
| = | 25 2 | × | 5 6 |
| U | = | 125 12 |
| U | = | 10.416667 |