| ( | 1 100 | + | x | ) | ÷ | ( | 7 200 | − | x | ) | × | ( | 27 1000 | − | x | ) | = | 150000000 |
| 方程两边同时乘以: | ( | 7 200 | − | x | ) |
| ( | 1 100 | + | x | ) | ( | 27 1000 | − | x | ) | = | 150000000 | ( | 7 200 | − | x | ) |
1 100 | ( | 27 1000 | − | x | ) | + | x | ( | 27 1000 | − | x | ) | = | 150000000 | ( | 7 200 | − | x | ) |
1 100 | ( | 27 1000 | − | x | ) | + | x | ( | 27 1000 | − | x | ) | = | 150000000 | × | 7 200 | − | 150000000 | x |
1 100 | ( | 27 1000 | − | x | ) | + | x | ( | 27 1000 | − | x | ) | = | 5250000 | − | 150000000 | x |
1 100 | × | 27 1000 | − | 1 100 | x | + | x | ( | 27 1000 | − | x | ) | = | 5250000 | − | 150000000 | x |
27 100000 | − | 1 100 | x | + | x | ( | 27 1000 | − | x | ) | = | 5250000 | − | 150000000 | x |
27 100000 | − | 1 100 | x | + | x | × | 27 1000 | − | x | x | = | 5250000 | − | 150000000 | x |
27 100000 | + | 17 1000 | x | − | x | x | = | 5250000 | − | 150000000 | x |