3 200 | × | 1313 2500 | × | 30 | ÷ | 2 | × | x | x | + | 6 125 | × | 30000 | × | 30000 | ÷ | 1313 2500 | ÷ | x | ÷ | x | = | 4000 |
| 方程两边同时乘以: | x |
3 200 | × | 1313 2500 | × | 30 | ÷ | 2 | × | x | x | x | + | 6 125 | × | 30000 | × | 30000 | ÷ | 1313 2500 | ÷ | x | = | 4000 | x |
| 方程两边同时乘以: | x |
3 200 | × | 1313 2500 | × | 30 | ÷ | 2 | × | x | x | x | x | + | 6 125 | × | 30000 | × | 30000 | ÷ | 1313 2500 | = | 4000 | x | x |