| 85 | ( | 11169 200 | ( | 8000 | − | x | ) | + | ( | 12999 250 | x | ) | ) | = | 11169 2 | ( | 8000 | − | x | ) |
| Left side of the equation = | 85 | × | 11169 200 | ( | 8000 | − | x | ) | + | 85 | ( | 12999 250 | x | ) |
| = | 189873 40 | ( | 8000 | − | x | ) | + | 85 | ( | 12999 250 | x | ) |
| = | 189873 40 | × | 8000 | − | 189873 40 | x | + | 85 | ( | 12999 250 | x | ) |
| = | 37974600 | − | 189873 40 | x | + | 85 | ( | 12999 250 | x | ) |
| = | 37974600 | − | 189873 40 | x | + | 85 | × | 12999 250 | x |
| = | 37974600 | − | 189873 40 | x | + | 220983 50 | x |
| = | 37974600 | − | 65433 200 | x |
| 37974600 | − | 65433 200 | x | = | 11169 2 | ( | 8000 | − | x | ) |
| Right side of the equation = | 11169 2 | × | 8000 | − | 11169 2 | x |
| = | 44676000 | − | 11169 2 | x |
| 37974600 | − | 65433 200 | x | = | 44676000 | − | 11169 2 | x |
| - | 65433 200 | x | + | 11169 2 | x | = | 44676000 | − | 37974600 |
1051467 200 | x | = | 44676000 | − | 37974600 |
1051467 200 | x | = | 6701400 |
| x | = | 6701400 | ÷ | 1051467 200 |
| = | 6701400 | × | 200 1051467 |
| = | 131400 | × | 200 20617 |
| x | = | 26280000 20617 |
| x | = | 1274.676238 |