| 35 | ( | x | + | 21 20 | ) | ( | x | + | 1 | ) | = | 483 10 |
| Left side of the equation = | 35 | x | ( | x | + | 1 | ) | + | 35 | × | 21 20 | ( | x | + | 1 | ) |
| = | 35 | x | ( | x | + | 1 | ) | + | 147 4 | ( | x | + | 1 | ) |
| = | 35 | x | x | + | 35 | x | × | 1 | + | 147 4 | ( | x | + | 1 | ) |
| = | 35 | x | x | + | 35 | x | + | 147 4 | ( | x | + | 1 | ) |
| = | 35 | x | x | + | 35 | x | + | 147 4 | x | + | 147 4 | × | 1 |
| = | 35 | x | x | + | 35 | x | + | 147 4 | x | + | 147 4 |
| = | 35 | x | x | + | 287 4 | x | + | 147 4 |
| 35 | x | x | + | 287 4 | x | + | 147 4 | = | 483 10 |
| x1= | - | 11 5 |
| x2= | 3 20 |