| ( | 160 | + | x | ) | ( | 50 | − | 1 10 | x | ) | = | 9450 |
| Left side of the equation = | 160 | ( | 50 | − | 1 10 | x | ) | + | x | ( | 50 | − | 1 10 | x | ) |
| = | 160 | × | 50 | − | 160 | × | 1 10 | x | + | x | ( | 50 | − | 1 10 | x | ) |
| = | 8000 | − | 16 | x | + | x | ( | 50 | − | 1 10 | x | ) |
| = | 8000 | − | 16 | x | + | x | × | 50 | − | x | × | 1 10 | x |
| = | 8000 | + | 34 | x | − | x | × | 1 10 | x |
| 8000 | + | 34 | x | − | x | × | 1 10 | x | = | 9450 |