17 20 | × | 32 | × | 4000 | × | 413 500 | x | = | 100531 20 | × | 500 | + | 140 | × | 16 | × | 165000 | × | 3 1000 | ( | ( | 1200 | − | x | ) | ÷ | x | ) |
17 20 | × | 32 | × | 4000 | × | 413 500 | x | = | 100531 20 | × | 500 | + | 140 | × | 16 | × | 165000 | × | 3 1000 | ( | 1200 | − | x | ) | ÷ | x |
449344 5 | x | = | 2513275 | + | 1108800 | ( | 1200 | − | x | ) | ÷ | x |
| 方程两边同时乘以: | x |
449344 5 | x | x | = | 2513275 | x | + | 1108800 | ( | 1200 | − | x | ) |
449344 5 | x | x | = | 2513275 | x | + | 1108800 | × | 1200 | − | 1108800 | x |
449344 5 | x | x | = | 2513275 | x | + | 1330560000 | − | 1108800 | x |
449344 5 | x | x | = | 1404475 | x | + | 1330560000 |