17 20 | x | + | ( | 57 40 | x | − | 35 2 | ) | ( | 100 | − | x | ) | ÷ | ( | 229 80 | x | + | 105 4 | ) | = | 75 |
| 方程两边同时乘以: | ( | 229 80 | x | + | 105 4 | ) |
17 20 | x | ( | 229 80 | x | + | 105 4 | ) | + | ( | 57 40 | x | − | 35 2 | ) | ( | 100 | − | x | ) | = | 75 | ( | 229 80 | x | + | 105 4 | ) |
17 20 | x | × | 229 80 | x | + | 17 20 | x | × | 105 4 | + | ( | 57 40 | x | − | 35 2 | ) | ( | 100 | − | x | ) | = | 75 | ( | 229 80 | x | + | 105 4 | ) |
17 20 | x | × | 229 80 | x | + | 17 20 | x | × | 105 4 | + | ( | 57 40 | x | − | 35 2 | ) | ( | 100 | − | x | ) | = | 75 | × | 229 80 | x | + | 75 | × | 105 4 |
3893 1600 | x | x | + | 357 16 | x | + | ( | 57 40 | x | − | 35 2 | ) | ( | 100 | − | x | ) | = | 3435 16 | x | + | 7875 4 |
3893 1600 | x | x | + | 357 16 | x | + | 57 40 | x | ( | 100 | − | x | ) | − | 35 2 | ( | 100 | − | x | ) | = | 3435 16 | x | + | 7875 4 |
3893 1600 | x | x | + | 357 16 | x | + | 57 40 | x | × | 100 | − | 57 40 | x | x | − | 35 2 | = | 3435 16 | x | + | 7875 4 |
3893 1600 | x | x | + | 357 16 | x | + | 285 2 | x | − | 57 40 | x | x | − | 35 2 | ( | 100 | − | x | ) | = | 3435 16 | x | + | 7875 4 |
3893 1600 | x | x | + | 2637 16 | x | − | 57 40 | x | x | − | 35 2 | ( | 100 | − | x | ) | = | 3435 16 | x | + | 7875 4 |
3893 1600 | x | x | + | 2637 16 | x | − | 57 40 | x | x | − | 35 2 | × | 100 | + | 35 2 | x | = | 3435 16 | x | + | 7875 4 |
3893 1600 | x | x | + | 2637 16 | x | − | 57 40 | x | x | − | 1750 | + | 35 2 | x | = | 3435 16 | x | + | 7875 4 |
3893 1600 | x | x | + | 2917 16 | x | − | 57 40 | x | x | − | 1750 | = | 3435 16 | x | + | 7875 4 |