| ( | x | − | 240 | ) | ( | 1 | − | 25 100 | ) | ÷ | ( | 8000 | + | 600 | ) | = | ( | x | − | 400 | ) | ( | 1 | − | 25 100 | ) | ÷ | 8000 |
| 方程两边同时乘以: | ( | 8000 | + | 600 | ) |
| ( | x | − | 240 | ) | ( | 1 | − | 25 100 | ) | = | ( | x | − | 400 | ) | ( | 1 | − | 25 100 | ) | ÷ | 8000 | × | ( | 8000 | + | 600 | ) |
| x | ( | 1 | − | 25 100 | ) | − | 240 | ( | 1 | − | 25 100 | ) | = | ( | x | − | 400 | ) | ( | 1 | − | 25 100 | ) | ÷ | 8000 | × | ( | 8000 | + | 600 | ) |
| x | ( | 1 | − | 25 100 | ) | − | 240 | ( | 1 | − | 25 100 | ) | = | x | ( | 1 | − | 25 100 | ) | ÷ | 8000 | × | ( | 8000 | + | 600 | ) | − | 400 | ( | 1 | − | 25 100 | ) | ÷ | 8000 | × | ( | 8000 | + | 600 | ) |
| x | ( | 1 | − | 25 100 | ) | − | 240 | ( | 1 | − | 25 100 | ) | = | x | ( | 1 | − | 25 100 | ) | × | 1 8000 | ( | 8000 | + | 600 | ) | − | 1 20 | ( | 1 | − | 25 100 | ) | ( | 8000 | + | 600 | ) |
| x | × | 1 | − | x | × | 25 100 | − | 240 | ( | 1 | − | 25 100 | ) | = | x | ( | 1 | − | 25 100 | ) | × | 1 8000 | ( | 8000 | + | 600 | ) | − | 1 20 | ( | 1 | − | 25 100 | ) | ( | 8000 | + | 600 | ) |
| x | × | 1 | − | x | × | 25 100 | − | 240 | ( | 1 | − | 25 100 | ) | = | x | × | 1 | × | 1 8000 | ( | 8000 | + | 600 | ) | − | x | × | 25 100 | × | 1 8000 | ( | 8000 | + | 600 | ) | − | 1 20 | ( | 1 | − | 25 100 | ) | ( | 8000 | + | 600 | ) |
| x | × | 1 | − | x | × | 25 100 | − | 240 | ( | 1 | − | 25 100 | ) | = | x | × | 1 8000 | ( | 8000 | + | 600 | ) | − | x | × | 1 32000 | ( | 8000 | + | 600 | ) | − | 1 20 | ( | 1 | − | 25 100 | ) | ( | 8000 | + | 600 | ) |
3 4 | x | − | 240 | ( | 1 | − | 25 100 | ) | = | x | × | 1 8000 | ( | 8000 | + | 600 | ) | − | x | × | 1 32000 | ( | 8000 | + | 600 | ) | − | 1 20 | ( | 1 | − | 25 100 | ) | ( | 8000 | + | 600 | ) |
3 4 | x | − | 240 | × | 1 | + | 240 | × | 25 100 | = | x | × | 1 8000 | ( | 8000 | + | 600 | ) | − | x | × | 1 32000 | ( | 8000 | + | 600 | ) | − | 1 20 | ( | 1 | − | 25 100 | ) | ( | 8000 | + | 600 | ) |
3 4 | x | − | 240 | × | 1 | + | 240 | × | 25 100 | = | x | × | 1 8000 | × | 8000 | + | x | × | 1 8000 | × | 600 | − | x | × | 1 32000 | ( | 8000 | + | 600 | ) | − | 1 20 | ( | 1 | − | 25 100 | ) | ( | 8000 | + | 600 | ) |
3 4 | x | − | 240 | + | 60 | = | x | × | 1 | + | x | × | 3 40 | − | x | × | 1 32000 | ( | 8000 | + | 600 | ) | − | 1 20 | ( | 1 | − | 25 100 | ) | ( | 8000 | + | 600 | ) |
3 4 | x | − | 180 | = | 43 40 | x | − | x | × | 1 32000 | ( | 8000 | + | 600 | ) | − | 1 20 | ( | 1 | − | 25 100 | ) | ( | 8000 | + | 600 | ) |
3 4 | x | − | 180 | = | 43 40 | x | − | x | × | 1 32000 | × | 8000 | − | x | × | 1 32000 | × | 600 | − | 1 20 | ( | 1 | − | 25 100 | ) | ( | 8000 | + | 600 | ) |
3 4 | x | − | 180 | = | 43 40 | x | − | x | × | 1 4 | − | x | × | 3 160 | − | 1 20 | ( | 1 | − | 25 100 | ) | ( | 8000 | + | 600 | ) |
3 4 | x | − | 180 | = | 129 160 | x | − | 1 20 | ( | 1 | − | 25 100 | ) | ( | 8000 | + | 600 | ) |
3 4 | x | − | 180 | = | 129 160 | x | − | 1 20 | × | 1 | ( | 8000 | + | 600 | ) | + | 1 20 | × | 25 100 | ( | 8000 | + | 600 | ) |
3 4 | x | − | 180 | = | 129 160 | x | − | 1 20 | ( | 8000 | + | 600 | ) | + | 1 80 | ( | 8000 | + | 600 | ) |
3 4 | x | − | 180 | = | 129 160 | x | − | 1 20 | × | 8000 | − | 1 20 | × | 600 | + | 1 80 | ( | 8000 | + | 600 | ) |
3 4 | x | − | 180 | = | 129 160 | x | − | 400 | − | 30 | + | 1 80 | ( | 8000 | + | 600 | ) |
3 4 | x | − | 180 | = | 129 160 | x | − | 430 | + | 1 80 | ( | 8000 | + | 600 | ) |
3 4 | x | − | 180 | = | 129 160 | x | − | 430 | + | 1 80 | × | 8000 | + | 1 80 | × | 600 |
3 4 | x | − | 180 | = | 129 160 | x | − | 430 | + | 100 | + | 15 2 |
3 4 | x | − | 180 | = | 129 160 | x | − | 645 2 |
3 4 | x | − | 129 160 | x | = | - | 645 2 | + | 180 |
| - | 9 160 | x | = | - | 645 2 | + | 180 |
| - | 9 160 | x | = | - | 285 2 |
285 2 | = | 9 160 | x |
9 160 | x | = | 285 2 |
| x | = | 285 2 | ÷ | 9 160 |
| = | 285 2 | × | 160 9 |
| = | 95 | × | 80 3 |
| x | = | 7600 3 |
| x | = | 2533.333333 |