| ( | 20833 | x | + | 4583 | ( | 12 | − | x | ) | ) | × | 21 2 | + | ( | 21000 | + | 5000 | x | ) | = | 2000000 |
| Left side of the equation = | 20833 | x | × | 21 2 | + | 4583 | ( | 12 | − | x | ) | × | 21 2 | + | ( | 21000 | + | 5000 | x | ) |
| = | 437493 2 | x | + | 96243 2 | ( | 12 | − | x | ) | + | ( | 21000 | + | 5000 | x | ) |
| = | 437493 2 | x | + | 96243 2 | × | 12 | − | 96243 2 | x | + | ( | 21000 | + | 5000 | x | ) |
| = | 437493 2 | x | + | 577458 | − | 96243 2 | x | + | ( | 21000 | + | 5000 | x | ) |
| = | 170625 | x | + | 577458 | + | ( | 21000 | + | 5000 | x | ) |
| = | 170625 | x | + | 577458 | + | 21000 | + | 5000 | x |
| = | 175625 | x | + | 598458 |
| 175625 | x | + | 598458 | = | 2000000 |
| 175625 | x | = | 2000000 | − | 598458 |
| 175625 | x | = | 1401542 |
| x | = | 1401542 | ÷ | 175625 |
| = | 1401542 | × | 1 175625 |
| x | = | 1401542 175625 |
| x | = | 7.98031 |