| ( | 109 | − | x | ) | ÷ | ( | 110 | − | x | ) | = | ( | 108 | − | x | ) | ÷ | ( | 10809 100 | − | x | ) |
| 方程两边同时乘以: | ( | 110 | − | x | ) | , | ( | 10809 100 | − | x | ) |
| ( | 109 | − | x | ) | ( | 10809 100 | − | x | ) | = | ( | 108 | − | x | ) | ( | 110 | − | x | ) |
| 109 | ( | 10809 100 | − | x | ) | − | x | ( | 10809 100 | − | x | ) | = | ( | 108 | − | x | ) | ( | 110 | − | x | ) |
| 109 | ( | 10809 100 | − | x | ) | − | x | ( | 10809 100 | − | x | ) | = | 108 | ( | 110 | − | x | ) | − | x | ( | 110 | − | x | ) |
| 109 | × | 10809 100 | − | 109 | x | − | x | ( | 10809 100 | − | x | ) | = | 108 | ( | 110 | − | x | ) | − | x | ( | 110 | − | x | ) |
| 109 | × | 10809 100 | − | 109 | x | − | x | ( | 10809 100 | − | x | ) | = | 108 | × | 110 | − | 108 | x | − | x | ( | 110 | − | x | ) |
1178181 100 | − | 109 | x | − | x | ( | 10809 100 | − | x | ) | = | 11880 | − | 108 | x | − | x | ( | 110 | − | x | ) |
1178181 100 | − | 109 | x | − | x | × | 10809 100 | + | x | x | = | 11880 | − | 108 | x | − | x | ( | 110 | − | x | ) |
1178181 100 | − | 109 | x | − | x | × | 10809 100 | + | x | x | = | 11880 | − | 108 | x | − | x | × | 110 | + | x | x |
1178181 100 | − | 21709 100 | x | + | x | x | = | 11880 | − | 218 | x | + | x | x |