| ( | ( | x | ÷ | 750 | ) | x | × | 3 5 | + | ( | 216 | ÷ | 300 | ) | x | × | 2 5 | ) | x | × | 750 | = | 11007 20 |
| 方程左边 = | ( | x | ÷ | 750 | ) | x | × | 3 5 | x | × | 750 | + | ( | 216 | ÷ | 300 | ) | x | × | 2 5 | x | × | 750 |
| = | ( | x | ÷ | 750 | ) | x | × | 450 | x | + | ( | 216 | ÷ | 300 | ) | x | × | 300 | x |
| = | x | ÷ | 750 | × | x | × | 450 | x | + | ( | 216 | ÷ | 300 | ) | x | × | 300 | x |
| = | x | × | 3 5 | x | x | + | ( | 216 | ÷ | 300 | ) | x | × | 300 | x |
| = | x | × | 3 5 | x | x | + | 216 | ÷ | 300 | × | x | × | 300 | x |
| = | x | × | 3 5 | x | x | + | 216 | x | x |
| x | × | 3 5 | x | x | + | 216 | x | x | = | 11007 20 |