9 2 | ÷ | ( | x | − | 9 2 | ) | = | 1 | ÷ | 80 |
| 方程两边同时乘以: | ( | x | − | 9 2 | ) |
9 2 | = | 1 | ÷ | 80 | × | ( | x | − | 9 2 | ) |
9 2 | = | 1 | ÷ | 80 | × | x | − | 1 | ÷ | 80 | × | 9 2 |
9 2 | = | 1 80 | x | − | 9 160 |
| - | 1 80 | x | = | - | 9 160 | − | 9 2 |
| - | 1 80 | x | = | - | 729 160 |
729 160 | = | 1 80 | x |
1 80 | x | = | 729 160 |
| x | = | 729 160 | ÷ | 1 80 |
| = | 729 160 | × | 80 |
| = | 729 2 | × | 1 |
| x | = | 729 2 |
| x | = | 364.5 |