7 2 | × | 3000 | ÷ | x | + | ( | 7500 | ÷ | x | − | 350 | ) | ( | 7 2 | − | 1 5 | x | ) | + | 200 | ( | 4 5 | ( | 7 2 | + | x | ) | − | 6 5 | x | ) | = | 12060 |
| 方程两边同时乘以: | x |
7 2 | × | 3000 | + | ( | 7500 | ÷ | x | − | 350 | ) | ( | 7 2 | − | 1 5 | x | ) | x | + | 200 | ( | 4 5 | ( | 7 2 | + | x | ) | − | 6 5 | x | ) | x | = | 12060 | x |
7 2 | × | 3000 | + | 7500 | ÷ | x | × | ( | 7 2 | − | 1 5 | x | ) | x | − | 350 | ( | 7 2 | − | 1 5 | x | ) | x | + | 200 | ( | 4 5 | ( | 7 2 | + | x | ) | − | 6 5 | x | ) | x | = | 12060 | x |
| 10500 | + | 7500 | ÷ | x | × | ( | 7 2 | − | 1 5 | x | ) | x | − | 350 | ( | 7 2 | − | 1 5 | x | ) | x | + | 200 | ( | 4 5 | ( | 7 2 | + | x | ) | − | 6 5 | x | ) | x | = | 12060 | x |
| 10500 | + | 7500 | ÷ | 1 | × | 7 2 | × | 1 | − | 7500 | ÷ | 1 | × | 1 5 | x | × | 1 | − | 350 | ( | 7 2 | − | 1 5 | x | ) | = | 12060 | x |
| 10500 | + | 26250 | − | 1500 | x | − | 350 | ( | 7 2 | − | 1 5 | x | ) | x | + | 200 | ( | 4 5 | ( | 7 2 | + | x | ) | − | 6 5 | x | ) | x | = | 12060 | x |
| 36750 | − | 1500 | x | − | 350 | ( | 7 2 | − | 1 5 | x | ) | x | + | 200 | ( | 4 5 | ( | 7 2 | + | x | ) | − | 6 5 | x | ) | x | = | 12060 | x |
| 36750 | − | 1500 | x | − | 350 | × | 7 2 | x | + | 350 | × | 1 5 | x | x | + | 200 | ( | 4 5 | ( | 7 2 | + | x | ) | − | 6 5 | x | ) | = | 12060 | x |
| 36750 | − | 1500 | x | − | 1225 | x | + | 70 | x | x | + | 200 | ( | 4 5 | ( | 7 2 | + | x | ) | − | 6 5 | x | ) | x | = | 12060 | x |
| 36750 | − | 2725 | x | + | 70 | x | x | + | 200 | ( | 4 5 | ( | 7 2 | + | x | ) | − | 6 5 | x | ) | x | = | 12060 | x |
| 36750 | − | 2725 | x | + | 70 | x | x | + | 200 | × | 4 5 | ( | 7 2 | + | x | ) | x | − | 200 | × | 6 5 | = | 12060 | x |
| 36750 | − | 2725 | x | + | 70 | x | x | + | 160 | ( | 7 2 | + | x | ) | x | − | 240 | x | x | = | 12060 | x |
| 36750 | − | 2725 | x | + | 70 | x | x | + | 160 | × | 7 2 | x | + | 160 | x | x | = | 12060 | x |
| 36750 | − | 2725 | x | + | 70 | x | x | + | 560 | x | + | 160 | x | x | − | 240 | = | 12060 | x |
| 36750 | − | 2165 | x | + | 70 | x | x | + | 160 | x | x | − | 240 | x | x | = | 12060 | x |