| ( | 55 | − | x | ) | ÷ | 100 | × | ( | 10 | − | 2 | x | ) | × | 100 | ( | 10 | − | 2 | x | ) | ÷ | ( | 2 | x | ÷ | 100 | ) | ÷ | ( | 2 | x | ÷ | 100 | ) | = | 3 200000 |
| 方程两边同时乘以: | ( | 2 | x | ÷ | 100 | ) |
| ( | 55 | − | x | ) | ÷ | 100 | × | ( | 10 | − | 2 | x | ) | × | 100 | ( | 10 | − | 2 | x | ) | ÷ | ( | 2 | x | ÷ | 100 | ) | = | 3 200000 | ( | 2 | x | ÷ | 100 | ) |
| 55 | ÷ | 100 | × | ( | 10 | − | 2 | x | ) | × | 100 | ( | 10 | − | 2 | x | ) | ÷ | ( | 2 | x | ÷ | 100 | ) | − | x | ÷ | 100 | × | ( | 10 | − | 2 | x | ) | × | 100 | ( | 10 | − | 2 | x | ) | ÷ | ( | 2 | x | ÷ | 100 | ) | = | 3 200000 | ( | 2 | x | ÷ | 100 | ) |
| 55 | ÷ | 100 | × | ( | 10 | − | 2 | x | ) | × | 100 | ( | 10 | − | 2 | x | ) | ÷ | ( | 2 | x | ÷ | 100 | ) | − | x | ÷ | 100 | × | ( | 10 | − | 2 | x | ) | × | 100 | ( | 10 | − | 2 | x | ) | ÷ | ( | 2 | x | ÷ | 100 | ) | = | 3 200000 | × | 2 | x | ÷ | 100 |
| 55 | ( | 10 | − | 2 | x | ) | ( | 10 | − | 2 | x | ) | ÷ | ( | 2 | x | ÷ | 100 | ) | − | x | × | 1 | ( | 10 | − | 2 | x | ) | ( | 10 | − | 2 | x | ) | ÷ | ( | 2 | x | ÷ | 100 | ) | = | 3 10000000 | x |
| 方程两边同时乘以: | ( | 2 | x | ÷ | 100 | ) |
| 55 | ( | 10 | − | 2 | x | ) | ( | 10 | − | 2 | x | ) | − | 1 | × | 1 | ( | 10 | − | 2 | x | ) | ( | 10 | − | 2 | x | ) | ÷ | ( | 2 | × | 1 | ÷ | 100 | ) | × | ( | 2 | x | ÷ | 100 | ) | = | 3 10000000 | x | ( | 2 | x | ÷ | 100 | ) |
| 55 | × | 10 | ( | 10 | − | 2 | x | ) | − | 55 | × | 2 | x | ( | 10 | − | 2 | x | ) | − | 1 | × | 1 | ( | 10 | − | 2 | x | ) | ( | 10 | − | 2 | x | ) | ÷ | ( | 2 | × | 1 | ÷ | 100 | ) | = | 3 10000000 | x | ( | 2 | x | ÷ | 100 | ) |
| 55 | × | 10 | ( | 10 | − | 2 | x | ) | − | 55 | × | 2 | x | ( | 10 | − | 2 | x | ) | − | 1 | × | 1 | ( | 10 | − | 2 | x | ) | ( | 10 | − | 2 | x | ) | ÷ | ( | 2 | × | 1 | ÷ | 100 | ) | = | 3 10000000 | x | × | 2 | x | ÷ | 100 |
| 550 | ( | 10 | − | 2 | x | ) | − | 110 | x | ( | 10 | − | 2 | x | ) | − | 1 | ( | 10 | − | 2 | x | ) | ( | 10 | − | 2 | x | ) | ÷ | ( | 2 | × | 1 | ÷ | 100 | ) | × | ( | 2 | x | ÷ | 100 | ) | = | 3 500000000 | x | x |
| 方程两边同时乘以: | ( | 2 | × | 1 | ÷ | 100 | ) |
| 550 | ( | 10 | − | 2 | x | ) | ( | 2 | × | 1 | ÷ | 100 | ) | − | 110 | x | ( | 10 | − | 2 | x | ) | ( | 2 | × | 1 | ÷ | 100 | ) | − | 1 | ( | 10 | − | 2 | x | ) | ( | 10 | − | 2 | x | ) | ( | 2 | x | ÷ | 100 | ) | = | 3 500000000 | x | x | ( | 2 | × | 1 | ÷ | 100 | ) |
| 550 | × | 10 | ( | 2 | × | 1 | ÷ | 100 | ) | − | 550 | × | 2 | x | ( | 2 | × | 1 | ÷ | 100 | ) | − | 110 | x | ( | 10 | − | 2 | x | ) | ( | 2 | × | 1 | ÷ | 100 | ) | − | 1 | = | 3 500000000 | x | x | ( | 2 | × | 1 | ÷ | 100 | ) |
| 550 | × | 10 | ( | 2 | × | 1 | ÷ | 100 | ) | − | 550 | × | 2 | x | ( | 2 | × | 1 | ÷ | 100 | ) | − | 110 | x | ( | 10 | − | 2 | x | ) | ( | 2 | × | 1 | ÷ | 100 | ) | − | 1 | = | 3 500000000 | x | x | × | 2 | × | 1 | ÷ | 100 |