| ( | 92 | + | 2 | x | ) | ( | 60 | + | x | ) | = | 885 |
| Left side of the equation = | 92 | ( | 60 | + | x | ) | + | 2 | x | ( | 60 | + | x | ) |
| = | 92 | × | 60 | + | 92 | x | + | 2 | x | ( | 60 | + | x | ) |
| = | 5520 | + | 92 | x | + | 2 | x | ( | 60 | + | x | ) |
| = | 5520 | + | 92 | x | + | 2 | x | × | 60 | + | 2 | x | x |
| = | 5520 | + | 92 | x | + | 120 | x | + | 2 | x | x |
| = | 5520 | + | 212 | x | + | 2 | x | x |
| 5520 | + | 212 | x | + | 2 | x | x | = | 885 |