| ( | 1 2 | + | ( | 9 | ÷ | ( | 9 | + | x | ) | ) | ÷ | ( | 1 2 | + | ( | 9 | ÷ | ( | 9 | + | 2 | x | ) | ) | ) | ) | = | 3 | ÷ | 5 |
1 2 | + | ( | 9 | ÷ | ( | 9 | + | x | ) | ) | ÷ | ( | 1 2 | + | ( | 9 | ÷ | ( | 9 | + | 2 | x | ) | ) | ) | = | 3 | ÷ | 5 |
1 2 | + | ( | 9 | ÷ | ( | 9 | + | x | ) | ) | ÷ | ( | 1 2 | + | ( | 9 | ÷ | ( | 9 | + | 2 | x | ) | ) | ) | = | 3 5 |
| 方程两边同时乘以: | ( | 1 2 | + | ( | 9 | ÷ | ( | 9 | + | 2 | x | ) | ) | ) |
1 2 | ( | 1 2 | + | ( | 9 | ÷ | ( | 9 | + | 2 | x | ) | ) | ) | + | ( | 9 | ÷ | ( | 9 | + | x | ) | ) | = | 3 5 | ( | 1 2 | + | ( | 9 | ÷ | ( | 9 | + | 2 | x | ) | ) | ) |
1 2 | × | 1 2 | + | 1 2 | ( | 9 | ÷ | ( | 9 | + | 2 | x | ) | ) | + | ( | 9 | ÷ | ( | 9 | + | x | ) | ) | = | 3 5 | ( | 1 2 | + | ( | 9 | ÷ | ( | 9 | + | 2 | x | ) | ) | ) |
1 2 | × | 1 2 | + | 1 2 | ( | 9 | ÷ | ( | 9 | + | 2 | x | ) | ) | + | ( | 9 | ÷ | ( | 9 | + | x | ) | ) | = | 3 5 | × | 1 2 | + | 3 5 | ( | 9 | ÷ | ( | 9 | + | 2 | x | ) | ) |
1 4 | + | 1 2 | ( | 9 | ÷ | ( | 9 | + | 2 | x | ) | ) | + | ( | 9 | ÷ | ( | 9 | + | x | ) | ) | = | 3 10 | + | 3 5 | ( | 9 | ÷ | ( | 9 | + | 2 | x | ) | ) |
1 4 | + | 1 2 | × | 9 | ÷ | ( | 9 | + | 2 | x | ) | + | ( | 9 | ÷ | ( | 9 | + | x | ) | ) | = | 3 10 | + | 3 5 | ( | 9 | ÷ | ( | 9 | + | 2 | x | ) | ) |
1 4 | + | 1 2 | × | 9 | ÷ | ( | 9 | + | 2 | x | ) | + | ( | 9 | ÷ | ( | 9 | + | x | ) | ) | = | 3 10 | + | 3 5 | × | 9 | ÷ | ( | 9 | + | 2 | x | ) |
1 4 | + | 9 2 | ÷ | ( | 9 | + | 2 | x | ) | + | ( | 9 | ÷ | ( | 9 | + | x | ) | ) | = | 3 10 | + | 27 5 | ÷ | ( | 9 | + | 2 | x | ) |
| 方程两边同时乘以: | ( | 9 | + | 2 | x | ) |
1 4 | ( | 9 | + | 2 | x | ) | + | 9 2 | + | ( | 9 | ÷ | ( | 9 | + | x | ) | ) | ( | 9 | + | 2 | x | ) | = | 3 10 | ( | 9 | + | 2 | x | ) | + | 27 5 |
1 4 | × | 9 | + | 1 4 | × | 2 | x | + | 9 2 | + | ( | 9 | ÷ | ( | 9 | + | x | ) | ) | ( | 9 | + | 2 | x | ) | = | 3 10 | ( | 9 | + | 2 | x | ) | + | 27 5 |
1 4 | × | 9 | + | 1 4 | × | 2 | x | + | 9 2 | + | ( | 9 | ÷ | ( | 9 | + | x | ) | ) | ( | 9 | + | 2 | x | ) | = | 3 10 | × | 9 | + | 3 10 | × | 2 | x | + | 27 5 |
9 4 | + | 1 2 | x | + | 9 2 | + | ( | 9 | ÷ | ( | 9 | + | x | ) | ) | ( | 9 | + | 2 | x | ) | = | 27 10 | + | 3 5 | x | + | 27 5 |
27 4 | + | 1 2 | x | + | ( | 9 | ÷ | ( | 9 | + | x | ) | ) | ( | 9 | + | 2 | x | ) | = | 81 10 | + | 3 5 | x |
27 4 | + | 1 2 | x | + | 9 | ÷ | ( | 9 | + | x | ) | × | ( | 9 | + | 2 | x | ) | = | 81 10 | + | 3 5 | x |
| 方程两边同时乘以: | ( | 9 | + | x | ) |
27 4 | ( | 9 | + | x | ) | + | 1 2 | x | ( | 9 | + | x | ) | + | 9 | ( | 9 | + | 2 | x | ) | = | 81 10 | ( | 9 | + | x | ) | + | 3 5 | x | ( | 9 | + | x | ) |
27 4 | × | 9 | + | 27 4 | x | + | 1 2 | x | ( | 9 | + | x | ) | + | 9 | ( | 9 | + | 2 | x | ) | = | 81 10 | ( | 9 | + | x | ) | + | 3 5 | x | ( | 9 | + | x | ) |
27 4 | × | 9 | + | 27 4 | x | + | 1 2 | x | ( | 9 | + | x | ) | + | 9 | ( | 9 | + | 2 | x | ) | = | 81 10 | × | 9 | + | 81 10 | x | + | 3 5 | x | ( | 9 | + | x | ) |
243 4 | + | 27 4 | x | + | 1 2 | x | ( | 9 | + | x | ) | + | 9 | ( | 9 | + | 2 | x | ) | = | 729 10 | + | 81 10 | x | + | 3 5 | x | ( | 9 | + | x | ) |
243 4 | + | 27 4 | x | + | 1 2 | x | × | 9 | + | 1 2 | x | x | + | 9 | ( | 9 | + | 2 | x | ) | = | 729 10 | + | 81 10 | x | + | 3 5 | x | ( | 9 | + | x | ) |
243 4 | + | 27 4 | x | + | 1 2 | x | × | 9 | + | 1 2 | x | x | + | 9 | ( | 9 | + | 2 | x | ) | = | 729 10 | + | 81 10 | x | + | 3 5 | x | × | 9 | + | 3 5 | x | x |
243 4 | + | 27 4 | x | + | 9 2 | x | + | 1 2 | x | x | + | 9 | ( | 9 | + | 2 | x | ) | = | 729 10 | + | 81 10 | x | + | 27 5 | x | + | 3 5 | x | x |