( | x | ( | ( | 20 | - | x | ) | ( | 15 | - | x | ) | + | ( | 20 | - | x | ) | ( | 3 | - | x | ) | + | ( | 15 | - | x | ) | ( | 3 | - | x | ) | ) | + | x | x | × | 38 | - | x | x | × | 2 | ) | ÷ | ( | ( | 20 | - | x | ) | ( | 15 | - | x | ) | ( | 3 | - | x | ) | ) | = | 1 4 |
方程两边同时乘以: | ( | ( | 20 | - | x | ) | ( | 15 | - | x | ) | ( | 3 | - | x | ) | ) |
( | x | ( | ( | 20 | - | x | ) | ( | 15 | - | x | ) | + | ( | 20 | - | x | ) | ( | 3 | - | x | ) | + | ( | 15 | - | x | ) | ( | 3 | - | x | ) | ) | + | x | x | × | 38 | - | x | x | × | 2 | ) | = | 1 4 | ( | ( | 20 | - | x | ) | ( | 15 | - | x | ) | ( | 3 | - | x | ) | ) |
x | ( | ( | 20 | - | x | ) | ( | 15 | - | x | ) | + | ( | 20 | - | x | ) | ( | 3 | - | x | ) | + | ( | 15 | - | x | ) | ( | 3 | - | x | ) | ) | + | x | x | × | 38 | - | x | x | × | 2 | = | 1 4 | ( | ( | 20 | - | x | ) | ( | 15 | - | x | ) | ( | 3 | - | x | ) | ) |
x | ( | ( | 20 | - | x | ) | ( | 15 | - | x | ) | + | ( | 20 | - | x | ) | ( | 3 | - | x | ) | + | ( | 15 | - | x | ) | ( | 3 | - | x | ) | ) | + | x | x | × | 38 | - | x | x | × | 2 | = | 1 4 | ( | 20 | - | x | ) | ( | 15 | - | x | ) | ( | 3 | - | x | ) |
x | ( | 20 | - | x | ) | ( | 15 | - | x | ) | + | x | ( | 20 | - | x | ) | ( | 3 | - | x | ) | + | x | ( | 15 | - | x | ) | ( | 3 | - | x | ) | + | x | x | × | 38 | - | x | x | × | 2 | = | 1 4 | ( | 20 | - | x | ) | ( | 15 | - | x | ) | ( | 3 | - | x | ) |
x | ( | 20 | - | x | ) | ( | 15 | - | x | ) | + | x | ( | 20 | - | x | ) | ( | 3 | - | x | ) | + | x | ( | 15 | - | x | ) | ( | 3 | - | x | ) | + | x | x | × | 38 | - | x | x | × | 2 | = | 1 4 | × | 20 | ( | 15 | - | x | ) | ( | 3 | - | x | ) | - | 1 4 | x | ( | 15 | - | x | ) | ( | 3 | - | x | ) |
x | ( | 20 | - | x | ) | ( | 15 | - | x | ) | + | x | ( | 20 | - | x | ) | ( | 3 | - | x | ) | + | x | ( | 15 | - | x | ) | ( | 3 | - | x | ) | + | x | x | × | 38 | - | x | x | × | 2 | = | 5 | ( | 15 | - | x | ) | ( | 3 | - | x | ) | - | 1 4 | x | ( | 15 | - | x | ) | ( | 3 | - | x | ) |
x | × | 20 | ( | 15 | - | x | ) | - | x | x | ( | 15 | - | x | ) | + | x | ( | 20 | - | x | ) | ( | 3 | - | x | ) | + | x | ( | 15 | - | x | ) | ( | 3 | - | x | ) | + | x | x | × | 38 | - | x | x | × | 2 | = | 5 | ( | 15 | - | x | ) | ( | 3 | - | x | ) | - | 1 4 | x | ( | 15 | - | x | ) | ( | 3 | - | x | ) |
x | × | 20 | ( | 15 | - | x | ) | - | x | x | ( | 15 | - | x | ) | + | x | ( | 20 | - | x | ) | ( | 3 | - | x | ) | + | x | ( | 15 | - | x | ) | ( | 3 | - | x | ) | + | x | x | × | 38 | - | x | x | × | 2 | = | 5 | × | 15 | ( | 3 | - | x | ) | - | 5 | x | ( | 3 | - | x | ) | - | 1 4 | x | ( | 15 | - | x | ) | ( | 3 | - | x | ) |
x | × | 20 | ( | 15 | - | x | ) | - | x | x | ( | 15 | - | x | ) | + | x | ( | 20 | - | x | ) | ( | 3 | - | x | ) | + | x | ( | 15 | - | x | ) | ( | 3 | - | x | ) | + | x | x | × | 38 | - | x | x | × | 2 | = | 75 | ( | 3 | - | x | ) | - | 5 | x | ( | 3 | - | x | ) | - | 1 4 | x | ( | 15 | - | x | ) | ( | 3 | - | x | ) |
x | × | 20 | × | 15 | - | x | × | 20 | x | - | x | x | ( | 15 | - | x | ) | + | x | ( | 20 | - | x | ) | ( | 3 | - | x | ) | + | x | ( | 15 | - | x | ) | ( | 3 | - | x | ) | + | x | x | × | 38 | - | x | x | × | 2 | = | 75 | ( | 3 | - | x | ) | - | 5 | x | ( | 3 | - | x | ) | - | 1 4 | x | ( | 15 | - | x | ) | ( | 3 | - | x | ) |
x | × | 20 | × | 15 | - | x | × | 20 | x | - | x | x | ( | 15 | - | x | ) | + | x | ( | 20 | - | x | ) | ( | 3 | - | x | ) | + | x | ( | 15 | - | x | ) | ( | 3 | - | x | ) | + | x | x | × | 38 | - | x | x | × | 2 | = | 75 | × | 3 | - | 75 | x | - | 5 | x | ( | 3 | - | x | ) | - | 1 4 | x | ( | 15 | - | x | ) | ( | 3 | - | x | ) |
x | × | 300 | - | x | × | 20 | x | - | x | x | ( | 15 | - | x | ) | + | x | ( | 20 | - | x | ) | ( | 3 | - | x | ) | + | x | ( | 15 | - | x | ) | ( | 3 | - | x | ) | + | x | x | × | 38 | - | x | x | × | 2 | = | 225 | - | 75 | x | - | 5 | x | ( | 3 | - | x | ) | - | 1 4 | x | ( | 15 | - | x | ) | ( | 3 | - | x | ) |
300 | x | - | x | × | 20 | x | - | x | x | × | 15 | + | x | x | x | + | x | ( | 20 | - | x | ) | ( | 3 | - | x | ) | + | x | ( | 15 | - | x | ) | ( | 3 | - | x | ) | + | x | x | × | 38 | - | x | x | × | 2 | = | 225 | - | 75 | x | - | 5 | x | ( | 3 | - | x | ) | - | 1 4 | x | ( | 15 | - | x | ) | ( | 3 | - | x | ) |
300 | x | - | x | × | 20 | x | - | x | x | × | 15 | + | x | x | x | + | x | ( | 20 | - | x | ) | ( | 3 | - | x | ) | + | x | ( | 15 | - | x | ) | ( | 3 | - | x | ) | + | x | x | × | 38 | - | x | x | × | 2 | = | 225 | - | 75 | x | - | 5 | x | × | 3 | + | 5 | x | x | - | 1 4 | x | ( | 15 | - | x | ) | ( | 3 | - | x | ) |
300 | x | - | x | × | 20 | x | - | x | x | × | 15 | + | x | x | x | + | x | ( | 20 | - | x | ) | ( | 3 | - | x | ) | + | x | ( | 15 | - | x | ) | ( | 3 | - | x | ) | + | x | x | × | 38 | - | x | x | × | 2 | = | 225 | - | 75 | x | - | 15 | x | + | 5 | x | x | - | 1 4 | x | ( | 15 | - | x | ) | ( | 3 | - | x | ) |
300 | x | - | x | × | 20 | x | - | x | x | × | 15 | + | x | x | x | + | x | ( | 20 | - | x | ) | ( | 3 | - | x | ) | + | x | ( | 15 | - | x | ) | ( | 3 | - | x | ) | + | x | x | × | 38 | - | x | x | × | 2 | = | 225 | - | 90 | x | + | 5 | x | x | - | 1 4 | x | ( | 15 | - | x | ) | ( | 3 | - | x | ) |
300 | x | - | x | × | 20 | x | - | x | x | × | 15 | + | x | x | x | + | x | × | 20 | ( | 3 | - | x | ) | - | x | x | ( | 3 | - | x | ) | + | x | ( | 15 | - | x | ) | ( | 3 | - | x | ) | + | x | x | × | 38 | - | x | x | × | 2 | = | 225 | - | 90 | x | + | 5 | x | x | - | 1 4 | x | ( | 15 | - | x | ) | ( | 3 | - | x | ) |
300 | x | - | x | × | 20 | x | - | x | x | × | 15 | + | x | x | x | + | x | × | 20 | ( | 3 | - | x | ) | - | x | x | ( | 3 | - | x | ) | + | x | ( | 15 | - | x | ) | ( | 3 | - | x | ) | + | x | x | × | 38 | - | x | x | × | 2 | = | 225 | - | 90 | x | + | 5 | x | x | - | 1 4 | x | × | 15 | ( | 3 | - | x | ) | + | 1 4 | x | x | ( | 3 | - | x | ) |
300 | x | - | x | × | 20 | x | - | x | x | × | 15 | + | x | x | x | + | x | × | 20 | ( | 3 | - | x | ) | - | x | x | ( | 3 | - | x | ) | + | x | ( | 15 | - | x | ) | ( | 3 | - | x | ) | + | x | x | × | 38 | - | x | x | × | 2 | = | 225 | - | 90 | x | + | 5 | x | x | - | 15 4 | x | ( | 3 | - | x | ) | + | 1 4 | x | x | ( | 3 | - | x | ) |
300 | x | - | x | × | 20 | x | - | x | x | × | 15 | + | x | x | x | + | x | × | 20 | × | 3 | - | x | × | 20 | x | - | x | x | ( | 3 | - | x | ) | + | x | ( | 15 | - | x | ) | ( | 3 | - | x | ) | + | x | x | × | 38 | - | x | x | × | 2 | = | 225 | - | 90 | x | + | 5 | x | x | - | 15 4 | x | ( | 3 | - | x | ) | + | 1 4 | x | x | ( | 3 | - | x | ) |
300 | x | - | x | × | 20 | x | - | x | x | × | 15 | + | x | x | x | + | x | × | 20 | × | 3 | - | x | × | 20 | x | - | x | x | ( | 3 | - | x | ) | + | x | ( | 15 | - | x | ) | ( | 3 | - | x | ) | + | x | x | × | 38 | - | x | x | × | 2 | = | 225 | - | 90 | x | + | 5 | x | x | - | 15 4 | x | × | 3 | + | 15 4 | x | x | + | 1 4 | x | x | ( | 3 | - | x | ) |
300 | x | - | x | × | 20 | x | - | x | x | × | 15 | + | x | x | x | + | x | × | 60 | - | x | × | 20 | x | - | x | x | ( | 3 | - | x | ) | + | x | ( | 15 | - | x | ) | ( | 3 | - | x | ) | + | x | x | × | 38 | - | x | x | × | 2 | = | 225 | - | 90 | x | + | 5 | x | x | - | 45 4 | x | + | 15 4 | x | x | + | 1 4 | x | x | ( | 3 | - | x | ) |
360 | x | - | x | × | 20 | x | - | x | x | × | 15 | + | x | x | x | - | x | × | 20 | x | - | x | x | ( | 3 | - | x | ) | + | x | ( | 15 | - | x | ) | ( | 3 | - | x | ) | + | x | x | × | 38 | - | x | x | × | 2 | = | 225 | - | 405 4 | x | + | 5 | x | x | + | 15 4 | x | x | + | 1 4 | x | x | ( | 3 | - | x | ) |
360 | x | - | x | × | 20 | x | - | x | x | × | 15 | + | x | x | x | - | x | × | 20 | x | - | x | x | × | 3 | + | x | x | x | + | x | ( | 15 | - | x | ) | ( | 3 | - | x | ) | + | x | x | × | 38 | - | x | x | × | 2 | = | 225 | - | 405 4 | x | + | 5 | x | x | + | 15 4 | x | x | + | 1 4 | x | x | ( | 3 | - | x | ) |
360 | x | - | x | × | 20 | x | - | x | x | × | 15 | + | x | x | x | - | x | × | 20 | x | - | x | x | × | 3 | + | x | x | x | + | x | ( | 15 | - | x | ) | ( | 3 | - | x | ) | + | x | x | × | 38 | - | x | x | × | 2 | = | 225 | - | 405 4 | x | + | 5 | x | x | + | 15 4 | x | x | + | 1 4 | x | x | × | 3 | - | 1 4 | x | x | x |