| 1 | ÷ | ( | 173059 1000000000 | x | ) | − | 1 | ÷ | ( | 3 10000 | x | ) | = | 21900000000 |
| 方程两边同时乘以: | ( | 173059 1000000000 | x | ) |
| 1 | − | 1 | ÷ | ( | 3 10000 | × | 1 | ) | × | ( | 173059 1000000000 | × | 1 | ) | = | 21900000000 | ( | 173059 1000000000 | x | ) |
| 1 | − | 1 | ÷ | ( | 3 10000 | × | 1 | ) | × | 173059 1000000000 | × | 1 | = | 21900000000 | ( | 173059 1000000000 | x | ) |
| 1 | − | 1 | ÷ | ( | 3 10000 | × | 1 | ) | × | 173059 1000000000 | × | 1 | = | 21900000000 | × | 173059 1000000000 | x |