15 2 | x | × | 600 | × | 1000000 | + | 210000 | × | 188 | ÷ | x | × | ( | x | − | 55 | ) | × | 1077 | = | 218000 | × | 188 | ÷ | x | × | ( | 90 | − | x | ) | × | 1500 | + | 218000 | × | 188 | ÷ | x | × | ( | 350 | − | x | ) | × | 1500 |
| 方程两边同时乘以: | x |
15 2 | x | × | 600 | × | 1000000 | x | + | 210000 | × | 188 | ( | x | − | 55 | ) | × | 1077 | = | 218000 | × | 188 | ÷ | 1 | × | ( | 90 | − | x | ) | × | 1500 | × | 1 | + | 218000 | × | 188 | ÷ | 1 | × | ( | 350 | − | x | ) | × | 1500 | × | 1 |
15 2 | x | × | 600 | × | 1000000 | x | + | 210000 | × | 188 | x | × | 1077 | − | 210000 | × | 188 | × | 55 | = | 218000 | × | 188 | ÷ | 1 | × | ( | 90 | − | x | ) | × | 1500 | × | 1 | + | 218000 | × | 188 | ÷ | 1 | × | ( | 350 | − | x | ) | × | 1500 | × | 1 |
15 2 | x | × | 600 | × | 1000000 | x | + | 210000 | × | 188 | x | × | 1077 | − | 210000 | × | 188 | × | 55 | = | 218000 | × | 188 | ÷ | 1 | × | 90 | × | 1500 | × | 1 | − | 218000 | × | 188 | ÷ | 1 | × | x | × | 1500 | × | 1 |