| ( | 109 | − | x | ) | ÷ | ( | 110 | − | x | ) | = | ( | 108 | − | x | ) | ÷ | ( | 1089 10 | − | x | ) |
| Multiply both sides of the equation by: | ( | 110 | − | x | ) | , | ( | 1089 10 | − | x | ) |
| ( | 109 | − | x | ) | ( | 1089 10 | − | x | ) | = | ( | 108 | − | x | ) | ( | 110 | − | x | ) |
| 109 | ( | 1089 10 | − | x | ) | − | x | ( | 1089 10 | − | x | ) | = | ( | 108 | − | x | ) | ( | 110 | − | x | ) |
| 109 | ( | 1089 10 | − | x | ) | − | x | ( | 1089 10 | − | x | ) | = | 108 | ( | 110 | − | x | ) | − | x | ( | 110 | − | x | ) |
| 109 | × | 1089 10 | − | 109 | x | − | x | ( | 1089 10 | − | x | ) | = | 108 | ( | 110 | − | x | ) | − | x | ( | 110 | − | x | ) |
| 109 | × | 1089 10 | − | 109 | x | − | x | ( | 1089 10 | − | x | ) | = | 108 | × | 110 | − | 108 | x | − | x | ( | 110 | − | x | ) |
118701 10 | − | 109 | x | − | x | ( | 1089 10 | − | x | ) | = | 11880 | − | 108 | x | − | x | ( | 110 | − | x | ) |
118701 10 | − | 109 | x | − | x | × | 1089 10 | + | x | x | = | 11880 | − | 108 | x | − | x | ( | 110 | − | x | ) |
118701 10 | − | 109 | x | − | x | × | 1089 10 | + | x | x | = | 11880 | − | 108 | x | − | x | × | 110 | + | x | x |
118701 10 | − | 2179 10 | x | + | x | x | = | 11880 | − | 218 | x | + | x | x |