| 240 | ÷ | ( | x | ÷ | 120 100 | ) | + | 1 | ÷ | 3 | + | 2 | ÷ | 3 | + | 240 | ÷ | x | = | 480 | ÷ | ( | x | ÷ | 120 100 | ) |
| 方程两边同时乘以: | ( | x | ÷ | 120 100 | ) |
| 240 | + | 1 | ÷ | 3 | × | ( | x | ÷ | 120 100 | ) | + | 2 | ÷ | 3 | × | ( | x | ÷ | 120 100 | ) | + | 240 | ÷ | 1 | × | ( | 1 | ÷ | 120 100 | ) | = | 480 |
| 240 | + | 1 | ÷ | 3 | × | x | ÷ | 120 100 | + | 2 | ÷ | 3 | × | ( | x | ÷ | 120 100 | ) | + | 240 | ÷ | 1 | × | ( | 1 | ÷ | 120 100 | ) | = | 480 |
| 240 | + | 5 18 | x | + | 2 3 | ( | x | ÷ | 120 100 | ) | + | 240 | ( | 1 | ÷ | 120 100 | ) | = | 480 |
| 240 | + | 5 18 | x | + | 2 3 | x | ÷ | 120 100 | + | 240 | ( | 1 | ÷ | 120 100 | ) | = | 480 |
| 240 | + | 5 18 | x | + | 5 9 | x | + | 240 | ( | 1 | ÷ | 120 100 | ) | = | 480 |
| 240 | + | 5 6 | x | + | 240 | ( | 1 | ÷ | 120 100 | ) | = | 480 |
| 240 | + | 5 6 | x | + | 240 | × | 1 | ÷ | 120 100 | = | 480 |
| 240 | + | 5 6 | x | + | 200 | = | 480 |
| 440 | + | 5 6 | x | = | 480 |
5 6 | x | = | 480 | − | 440 |
5 6 | x | = | 40 |
| x | = | 40 | ÷ | 5 6 |
| = | 40 | × | 6 5 |
| = | 8 | × | 6 |
| x | = | 48 |