| ( | 5 2 | + | 8 5 | ) | × | 2 | x | − | 189 100 | × | 8 5 | = | 12 |
| Left side of the equation = | ( | 5 2 | + | 8 5 | ) | × | 2 | x | − | 378 125 |
| ( | 5 2 | + | 8 5 | ) | × | 2 | x | − | 378 125 | = | 12 |
| Left side of the equation = | 5 2 | × | 2 | x | + | 8 5 | × | 2 | x | − | 378 125 |
| = | 5 | x | + | 16 5 | x | − | 378 125 |
| = | 41 5 | x | − | 378 125 |
41 5 | x | − | 378 125 | = | 12 |
41 5 | x | = | 12 | + | 378 125 |
41 5 | x | = | 1878 125 |
| x | = | 1878 125 | ÷ | 41 5 |
| = | 1878 125 | × | 5 41 |
| = | 1878 25 | × | 1 41 |
| x | = | 1878 1025 |
| x | = | 1.832195 |