( | 405 | x | - | 40 | x | x | + | 3 | x | x | x | ) | ÷ | ( | 900 | - | 405 | x | + | 38 | x | x | - | x | x | x | ) | = | 1 4 |
方程两边同时乘以: | ( | 900 | - | 405 | x | + | 38 | x | x | - | x | x | x | ) |
( | 405 | x | - | 40 | x | x | + | 3 | x | x | x | ) | = | 1 4 | ( | 900 | - | 405 | x | + | 38 | x | x | - | x | x | x | ) |
405 | x | - | 40 | x | x | + | 3 | x | x | x | = | 1 4 | ( | 900 | - | 405 | x | + | 38 | x | x | - | x | x | x | ) |
405 | x | - | 40 | x | x | + | 3 | x | x | x | = | 1 4 | × | 900 | - | 1 4 | × | 405 | x | + | 1 4 | × | 38 | x | x | - | 1 4 | x | x | x |
405 | x | - | 40 | x | x | + | 3 | x | x | x | = | 225 | - | 405 4 | x | + | 19 2 | x | x | - | 1 4 | x | x | x |