| ( | 85 | x | + | 5 | × | 203 2 | ) | ÷ | 2 | = | 185 2 |
| Left side of the equation = | 85 | x | × | 1 2 | + | 5 | × | 203 2 | × | 1 2 |
| = | 85 2 | x | + | 1015 4 |
85 2 | x | + | 1015 4 | = | 185 2 |
85 2 | x | = | 185 2 | − | 1015 4 |
85 2 | x | = | - | 645 4 |
| x | = | - | 645 4 | ÷ | 85 2 |
| = | - | 645 4 | × | 2 85 |
| = | - | 129 2 | × | 1 17 |
| x | = | - | 129 34 |
| x | = | - 3.794118 |