| 1500 | ÷ | x | = | 300 | ÷ | x | + | 1200 | ÷ | ( | 3 2 | x | ) | + | 4 |
| 方程两边同时乘以: | x | , | ( | 3 2 | × | 1 | ) |
| 1500 | ( | 3 2 | × | 1 | ) | = | 300 | ÷ | 1 | × | 1 | ( | 3 2 | × | 1 | ) | + | 1200 | × | 1 | + | 4 | x | ( | 3 2 | × | 1 | ) |
| 1500 | × | 3 2 | × | 1 | = | 300 | ÷ | 1 | × | 1 | ( | 3 2 | × | 1 | ) | + | 1200 | × | 1 | + | 4 | x | ( | 3 2 | × | 1 | ) |
| 1500 | × | 3 2 | × | 1 | = | 300 | ÷ | 1 | × | 1 | × | 3 2 | × | 1 | + | 1200 | × | 1 | + | 4 | x | ( | 3 2 | × | 1 | ) |
| 2250 | = | 450 | + | 1200 | + | 4 | x | ( | 3 2 | × | 1 | ) |
| 2250 | = | 1650 | + | 4 | x | ( | 3 2 | × | 1 | ) |
| 2250 | = | 1650 | + | 4 | x | × | 3 2 | × | 1 |
| 2250 | = | 1650 | + | 6 | x |
| - | 6 | x | = | 1650 | − | 2250 |
| - | 6 | x | = | - | 600 |
| 600 | = | 6 | x |
| 6 | x | = | 600 |
| x | = | 600 | ÷ | 6 |
| = | 600 | × | 1 6 |
| = | 100 | × | 1 |
| x | = | 100 |